77656252377 has 32 divisors (see below), whose sum is σ = 120089558016. Its totient is φ = 44168696000.

The previous prime is 77656252321. The next prime is 77656252379. The reversal of 77656252377 is 77325265677.

It is not a de Polignac number, because 77656252377 - 2⁶ = 77656252313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77656252379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 924999 + ... + 1005452.

It is an arithmetic number, because the mean of its divisors is an integer number (3752798688).

Almost surely, 2^77656252377 is an apocalyptic number.

It is an amenable number.

77656252377 is a deficient number, since it is larger than the sum of its proper divisors (42433305639).

77656252377 is a wasteful number, since it uses less digits than its factorization.

77656252377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1930541.

The product of its digits is 25930800, while the sum is 57.

It can be divided in two parts, 77656 and 252377, that added together give a palindrome (330033).

The spelling of 77656252377 in words is "seventy-seven billion, six hundred fifty-six million, two hundred fifty-two thousand, three hundred seventy-seven".