77555818022113 has 2 divisors, whose sum is σ = 77555818022114. Its totient is φ = 77555818022112.

The previous prime is 77555818022107. The next prime is 77555818022201. The reversal of 77555818022113 is 31122081855577.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77421837865024 + 133980157089 = 8798968^2 + 366033^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77555818022113 is a prime.

It is not a weakly prime, because it can be changed into another prime (77555818122113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38777909011056 + 38777909011057.

It is an arithmetic number, because the mean of its divisors is an integer number (38777909011057).

Almost surely, 2^{77555818022113} is an apocalyptic number.

It is an amenable number.

77555818022113 is a deficient number, since it is larger than the sum of its proper divisors (1).

77555818022113 is an equidigital number, since it uses as much as digits as its factorization.

77555818022113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704000, while the sum is 55.

The spelling of 77555818022113 in words is "seventy-seven trillion, five hundred fifty-five billion, eight hundred eighteen million, twenty-two thousand, one hundred thirteen".