16520234664 has 16 divisors (see below), whose sum is σ = 41300586720. Its totient is φ = 5506744880.

The previous prime is 16520234657. The next prime is 16520234669. The reversal of 16520234664 is 46643202561.

It is not an unprimeable number, because it can be changed into a prime (16520234669) 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, 344171532 + ... + 344171579.

It is an arithmetic number, because the mean of its divisors is an integer number (2581286670).

Almost surely, 2^16520234664 is an apocalyptic number.

It is an amenable number.

16520234664 is an abundant number, since it is smaller than the sum of its proper divisors (24780352056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16520234664 is a wasteful number, since it uses less digits than its factorization.

16520234664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688343120 (or 688343116 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 39.

The spelling of 16520234664 in words is "sixteen billion, five hundred twenty million, two hundred thirty-four thousand, six hundred sixty-four".