16514572685 has 24 divisors (see below), whose sum is σ = 21478360104. Its totient is φ = 12184473600.

The previous prime is 16514572663. The next prime is 16514572691. The reversal of 16514572685 is 58627541561.

It can be written as a sum of positive squares in 12 ways, for example, as 10581413956 + 5933158729 = 102866^2 + 77027^2 .

It is not a de Polignac number, because 16514572685 - 2²⁰ = 16513524109 is a prime.

It is a super-2 number, since 2×16514572685² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1006709 + ... + 1022981.

It is an arithmetic number, because the mean of its divisors is an integer number (894931671).

Almost surely, 2^16514572685 is an apocalyptic number.

It is an amenable number.

16514572685 is a deficient number, since it is larger than the sum of its proper divisors (4963787419).

16514572685 is a wasteful number, since it uses less digits than its factorization.

16514572685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17505 (or 17492 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 50.

The spelling of 16514572685 in words is "sixteen billion, five hundred fourteen million, five hundred seventy-two thousand, six hundred eighty-five".