76821689600 has 54 divisors (see below), whose sum is σ = 190145700990. Its totient is φ = 30728673280.

The previous prime is 76821689563. The next prime is 76821689617. The reversal of 76821689600 is 698612867.

It can be written as a sum of positive squares in 3 ways, for example, as 19582084096 + 57239605504 = 139936^2 + 239248^2 .

It is a congruent number.

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, 5995295 + ... + 6008094.

It is an arithmetic number, because the mean of its divisors is an integer number (3521216685).

Almost surely, 2^76821689600 is an apocalyptic number.

It is an amenable number.

76821689600 is an abundant number, since it is smaller than the sum of its proper divisors (113324011390).

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

76821689600 is a wasteful number, since it uses less digits than its factorization.

76821689600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12003415 (or 12003396 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 53.

The spelling of 76821689600 in words is "seventy-six billion, eight hundred twenty-one million, six hundred eighty-nine thousand, six hundred".