75212939664 has 80 divisors (see below), whose sum is σ = 220482435840. Its totient is φ = 24537548160.

The previous prime is 75212939651. The next prime is 75212939689. The reversal of 75212939664 is 46693921257.

75212939664 is a `hidden beast` number, since 7 + 521 + 29 + 3 + 96 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 75212939664.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1831867 + ... + 1872474.

It is an arithmetic number, because the mean of its divisors is an integer number (2756030448).

Almost surely, 2^75212939664 is an apocalyptic number.

It is an amenable number.

75212939664 is an abundant number, since it is smaller than the sum of its proper divisors (145269496176).

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

75212939664 is a wasteful number, since it uses less digits than its factorization.

75212939664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3704405 (or 3704393 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The spelling of 75212939664 in words is "seventy-five billion, two hundred twelve million, nine hundred thirty-nine thousand, six hundred sixty-four".