16315653645 has 12 divisors (see below), whose sum is σ = 28280466396. Its totient is φ = 8701681920.

The previous prime is 16315653643. The next prime is 16315653667. The reversal of 16315653645 is 54635651361.

It is a happy number.

16315653645 is a `hidden beast` number, since 1 + 63 + 1 + 56 + 536 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6241316004 + 10074337641 = 79002^2 + 100371^2 .

It is not a de Polignac number, because 16315653645 - 2¹ = 16315653643 is a prime.

It is a super-3 number, since 3×16315653645³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 362570081 = 16315653645 / (1 + 6 + 3 + 1 + 5 + 6 + 5 + 3 + 6 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 16315653645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16315653643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181284996 + ... + 181285085.

It is an arithmetic number, because the mean of its divisors is an integer number (2356705533).

Almost surely, 2^16315653645 is an apocalyptic number.

16315653645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16315653645 is a deficient number, since it is larger than the sum of its proper divisors (11964812751).

16315653645 is a wasteful number, since it uses less digits than its factorization.

16315653645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362570092 (or 362570089 counting only the distinct ones).

The product of its digits is 972000, while the sum is 45.

The spelling of 16315653645 in words is "sixteen billion, three hundred fifteen million, six hundred fifty-three thousand, six hundred forty-five".