16165616523 has 16 divisors (see below), whose sum is σ = 26082339840. Its totient is φ = 8694112896.

The previous prime is 16165616501. The next prime is 16165616569. The reversal of 16165616523 is 32561656161.

It is not a de Polignac number, because 16165616523 - 2⁵ = 16165616491 is a prime.

It is a super-2 number, since 2×16165616523² (a number of 21 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (16165616573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22640563 + ... + 22641276.

It is an arithmetic number, because the mean of its divisors is an integer number (1630146240).

Almost surely, 2^16165616523 is an apocalyptic number.

16165616523 is a deficient number, since it is larger than the sum of its proper divisors (9916723317).

16165616523 is a wasteful number, since it uses less digits than its factorization.

16165616523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45281866.

The product of its digits is 194400, while the sum is 42.

The spelling of 16165616523 in words is "sixteen billion, one hundred sixty-five million, six hundred sixteen thousand, five hundred twenty-three".