16261631564 has 24 divisors (see below), whose sum is σ = 29921782800. Its totient is φ = 7721743680.

The previous prime is 16261631549. The next prime is 16261631587. The reversal of 16261631564 is 46513616261.

It is a super-2 number, since 2×16261631564² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1141994 + ... + 1156145.

It is an arithmetic number, because the mean of its divisors is an integer number (1246740950).

Almost surely, 2^16261631564 is an apocalyptic number.

It is an amenable number.

16261631564 is a deficient number, since it is larger than the sum of its proper divisors (13660151236).

16261631564 is a wasteful number, since it uses less digits than its factorization.

16261631564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2298233 (or 2298231 counting only the distinct ones).

The product of its digits is 155520, while the sum is 41.

The spelling of 16261631564 in words is "sixteen billion, two hundred sixty-one million, six hundred thirty-one thousand, five hundred sixty-four".