77621182794 has 16 divisors (see below), whose sum is σ = 172491517440. Its totient is φ = 25873727580.

The previous prime is 77621182783. The next prime is 77621182801. The reversal of 77621182794 is 49728112677.

77621182794 is a `hidden beast` number, since 7 + 7 + 621 + 1 + 8 + 2 + 7 + 9 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1437429311 = 77621182794 / (7 + 7 + 6 + 2 + 1 + 1 + 8 + 2 + 7 + 9 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 77621182794.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 718714602 + ... + 718714709.

It is an arithmetic number, because the mean of its divisors is an integer number (10780719840).

Almost surely, 2^77621182794 is an apocalyptic number.

77621182794 is an abundant number, since it is smaller than the sum of its proper divisors (94870334646).

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

77621182794 is a wasteful number, since it uses less digits than its factorization.

77621182794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437429322 (or 1437429316 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The spelling of 77621182794 in words is "seventy-seven billion, six hundred twenty-one million, one hundred eighty-two thousand, seven hundred ninety-four".