77556842238 has 64 divisors (see below), whose sum is σ = 160167248640. Its totient is φ = 25024017408.

The previous prime is 77556842161. The next prime is 77556842257. The reversal of 77556842238 is 83224865577.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24518445 + ... + 24521607.

It is an arithmetic number, because the mean of its divisors is an integer number (2502613260).

Almost surely, 2^77556842238 is an apocalyptic number.

77556842238 is an abundant number, since it is smaller than the sum of its proper divisors (82610406402).

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

77556842238 is a wasteful number, since it uses less digits than its factorization.

77556842238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4233.

The product of its digits is 22579200, while the sum is 57.

The spelling of 77556842238 in words is "seventy-seven billion, five hundred fifty-six million, eight hundred forty-two thousand, two hundred thirty-eight".