16440635045 has 4 divisors (see below), whose sum is σ = 19728762060. Its totient is φ = 13152508032.

The previous prime is 16440635041. The next prime is 16440635047. The reversal of 16440635045 is 54053604461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54053604461 = 659 ⋅82023679.

It can be written as a sum of positive squares in 2 ways, for example, as 7787356516 + 8653278529 = 88246^2 + 93023^2 .

It is a cyclic number.

It is not a de Polignac number, because 16440635045 - 2² = 16440635041 is a prime.

It is a super-3 number, since 3×16440635045³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16440635041) 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 3 ways as a sum of consecutive naturals, for example, 1644063500 + ... + 1644063509.

It is an arithmetic number, because the mean of its divisors is an integer number (4932190515).

Almost surely, 2^16440635045 is an apocalyptic number.

It is an amenable number.

16440635045 is a deficient number, since it is larger than the sum of its proper divisors (3288127015).

16440635045 is an equidigital number, since it uses as much as digits as its factorization.

16440635045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3288127014.

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 16440635045 in words is "sixteen billion, four hundred forty million, six hundred thirty-five thousand, forty-five".