76321032644 has 18 divisors (see below), whose sum is σ = 137269157130. Its totient is φ = 37129148352.

The previous prime is 76321032617. The next prime is 76321032701. The reversal of 76321032644 is 44623012367.

It can be written as a sum of positive squares in 3 ways, for example, as 53061122500 + 23259910144 = 230350^2 + 152512^2 .

It is a super-3 number, since 3×76321032644³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 76321032598 and 76321032607.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6963209 + ... + 6974160.

It is an arithmetic number, because the mean of its divisors is an integer number (7626064285).

Almost surely, 2^76321032644 is an apocalyptic number.

76321032644 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

76321032644 is a deficient number, since it is larger than the sum of its proper divisors (60948124486).

76321032644 is a wasteful number, since it uses less digits than its factorization.

76321032644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13937447 (or 13937408 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 38.

The spelling of 76321032644 in words is "seventy-six billion, three hundred twenty-one million, thirty-two thousand, six hundred forty-four".