16487251664 has 20 divisors (see below), whose sum is σ = 34401285156. Its totient is φ = 7609500672.

The previous prime is 16487251663. The next prime is 16487251679. The reversal of 16487251664 is 46615278461.

It can be written as a sum of positive squares in 2 ways, for example, as 3424590400 + 13062661264 = 58520^2 + 114292^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16487251663) 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, 39632609 + ... + 39633024.

Almost surely, 2^16487251664 is an apocalyptic number.

It is an amenable number.

16487251664 is an abundant number, since it is smaller than the sum of its proper divisors (17914033492).

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

16487251664 is a wasteful number, since it uses less digits than its factorization.

16487251664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79265654 (or 79265648 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 50.

The spelling of 16487251664 in words is "sixteen billion, four hundred eighty-seven million, two hundred fifty-one thousand, six hundred sixty-four".