77121767060131 has 2 divisors, whose sum is σ = 77121767060132. Its totient is φ = 77121767060130.

The previous prime is 77121767060111. The next prime is 77121767060161. The reversal of 77121767060131 is 13106076712177.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77121767060131 - 2⁹ = 77121767059619 is a prime.

It is a super-2 number, since 2×77121767060131² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77121767060111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38560883530065 + 38560883530066.

It is an arithmetic number, because the mean of its divisors is an integer number (38560883530066).

Almost surely, 2^{77121767060131} is an apocalyptic number.

77121767060131 is a deficient number, since it is larger than the sum of its proper divisors (1).

77121767060131 is an equidigital number, since it uses as much as digits as its factorization.

77121767060131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518616, while the sum is 49.

The spelling of 77121767060131 in words is "seventy-seven trillion, one hundred twenty-one billion, seven hundred sixty-seven million, sixty thousand, one hundred thirty-one".