77917587270139 has 2 divisors, whose sum is σ = 77917587270140. Its totient is φ = 77917587270138.

The previous prime is 77917587270079. The next prime is 77917587270151. The reversal of 77917587270139 is 93107278571977.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77917587270139 is a prime.

It is a super-2 number, since 2×77917587270139² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77917587220139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38958793635069 + 38958793635070.

It is an arithmetic number, because the mean of its divisors is an integer number (38958793635070).

Almost surely, 2^{77917587270139} is an apocalyptic number.

77917587270139 is a deficient number, since it is larger than the sum of its proper divisors (1).

77917587270139 is an equidigital number, since it uses as much as digits as its factorization.

77917587270139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326728080, while the sum is 73.

The spelling of 77917587270139 in words is "seventy-seven trillion, nine hundred seventeen billion, five hundred eighty-seven million, two hundred seventy thousand, one hundred thirty-nine".