75664294720 has 84 divisors (see below), whose sum is σ = 209592070020. Its totient is φ = 25942038528.

The previous prime is 75664294663. The next prime is 75664294721. The reversal of 75664294720 is 2749246657.

It can be written as a sum of positive squares in 2 ways, for example, as 17436674304 + 58227620416 = 132048^2 + 241304^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75664294721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2397085 + ... + 2428444.

Almost surely, 2^75664294720 is an apocalyptic number.

75664294720 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

75664294720 is an abundant number, since it is smaller than the sum of its proper divisors (133927775300).

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

75664294720 is a wasteful number, since it uses less digits than its factorization.

75664294720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4825560 (or 4825543 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 52.

The spelling of 75664294720 in words is "seventy-five billion, six hundred sixty-four million, two hundred ninety-four thousand, seven hundred twenty".