6537758672 has 20 divisors (see below), whose sum is σ = 12668167236. Its totient is φ = 3268554240.

The previous prime is 6537758653. The next prime is 6537758677. The reversal of 6537758672 is 2768577356.

It can be written as a sum of positive squares in 2 ways, for example, as 2950227856 + 3587530816 = 54316^2 + 59896^2 .

It is a super-2 number, since 2×6537758672² = 85484576906622407168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6537758677) 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, 280922 + ... + 303302.

Almost surely, 2^6537758672 is an apocalyptic number.

It is an amenable number.

6537758672 is a deficient number, since it is larger than the sum of its proper divisors (6130408564).

6537758672 is a wasteful number, since it uses less digits than its factorization.

6537758672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40646 (or 40640 counting only the distinct ones).

The product of its digits is 14817600, while the sum is 56.

The square root of 6537758672 is about 80856.4077361838. The cubic root of 6537758672 is about 1869.8623128723.

The spelling of 6537758672 in words is "six billion, five hundred thirty-seven million, seven hundred fifty-eight thousand, six hundred seventy-two".