77860885662631 has 2 divisors, whose sum is σ = 77860885662632. Its totient is φ = 77860885662630.

The previous prime is 77860885662523. The next prime is 77860885662691. The reversal of 77860885662631 is 13626658806877.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77860885662631 - 2¹³ = 77860885654439 is a prime.

It is a super-2 number, since 2×77860885662631² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77860885662691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38930442831315 + 38930442831316.

It is an arithmetic number, because the mean of its divisors is an integer number (38930442831316).

Almost surely, 2^{77860885662631} is an apocalyptic number.

77860885662631 is a deficient number, since it is larger than the sum of its proper divisors (1).

77860885662631 is an equidigital number, since it uses as much as digits as its factorization.

77860885662631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 975421440, while the sum is 73.

The spelling of 77860885662631 in words is "seventy-seven trillion, eight hundred sixty billion, eight hundred eighty-five million, six hundred sixty-two thousand, six hundred thirty-one".