16731212564 has 36 divisors (see below), whose sum is σ = 32468301012. Its totient is φ = 7537770240.

The previous prime is 16731212549. The next prime is 16731212573. The reversal of 16731212564 is 46521213761.

It can be written as a sum of positive squares in 2 ways, for example, as 4388002564 + 12343210000 = 66242^2 + 111100^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98267 + ... + 207650.

Almost surely, 2^16731212564 is an apocalyptic number.

It is an amenable number.

16731212564 is a deficient number, since it is larger than the sum of its proper divisors (15737088448).

16731212564 is a wasteful number, since it uses less digits than its factorization.

16731212564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306056 (or 306043 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The spelling of 16731212564 in words is "sixteen billion, seven hundred thirty-one million, two hundred twelve thousand, five hundred sixty-four".