77551056131 has 2 divisors, whose sum is σ = 77551056132. Its totient is φ = 77551056130.

The previous prime is 77551056071. The next prime is 77551056169. The reversal of 77551056131 is 13165015577.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77551056131 - 2⁶ = 77551056067 is a prime.

It is a super-2 number, since 2×77551056131² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77551050131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38775528065 + 38775528066.

It is an arithmetic number, because the mean of its divisors is an integer number (38775528066).

Almost surely, 2^77551056131 is an apocalyptic number.

77551056131 is a deficient number, since it is larger than the sum of its proper divisors (1).

77551056131 is an equidigital number, since it uses as much as digits as its factorization.

77551056131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110250, while the sum is 41.

The spelling of 77551056131 in words is "seventy-seven billion, five hundred fifty-one million, fifty-six thousand, one hundred thirty-one".