77331054857 has 12 divisors (see below), whose sum is σ = 90453540996. Its totient is φ = 65917545120.

The previous prime is 77331054851. The next prime is 77331054859. The reversal of 77331054857 is 75845013377.

It can be written as a sum of positive squares in 2 ways, for example, as 25009524736 + 52321530121 = 158144^2 + 228739^2 .

It is not a de Polignac number, because 77331054857 - 2¹² = 77331050761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77331054851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4350758 + ... + 4368495.

It is an arithmetic number, because the mean of its divisors is an integer number (7537795083).

Almost surely, 2^77331054857 is an apocalyptic number.

It is an amenable number.

77331054857 is a deficient number, since it is larger than the sum of its proper divisors (13122486139).

77331054857 is a wasteful number, since it uses less digits than its factorization.

77331054857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8719448 (or 8719441 counting only the distinct ones).

The product of its (nonzero) digits is 2469600, while the sum is 50.

The spelling of 77331054857 in words is "seventy-seven billion, three hundred thirty-one million, fifty-four thousand, eight hundred fifty-seven".