16315633501 has 4 divisors (see below), whose sum is σ = 16315891900. Its totient is φ = 16315375104.

The previous prime is 16315633483. The next prime is 16315633541. The reversal of 16315633501 is 10533651361.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10533651361 = 79 ⋅133337359.

It can be written as a sum of positive squares in 2 ways, for example, as 7538754276 + 8776879225 = 86826^2 + 93685^2 .

It is a cyclic number.

It is not a de Polignac number, because 16315633501 - 2²⁹ = 15778762589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16315633541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35485 + ... + 184093.

It is an arithmetic number, because the mean of its divisors is an integer number (4078972975).

Almost surely, 2^16315633501 is an apocalyptic number.

It is an amenable number.

16315633501 is a deficient number, since it is larger than the sum of its proper divisors (258399).

16315633501 is a wasteful number, since it uses less digits than its factorization.

16315633501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258398.

The product of its (nonzero) digits is 24300, while the sum is 34.

The spelling of 16315633501 in words is "sixteen billion, three hundred fifteen million, six hundred thirty-three thousand, five hundred one".