77326056121 has 2 divisors, whose sum is σ = 77326056122. Its totient is φ = 77326056120.

The previous prime is 77326056107. The next prime is 77326056167. The reversal of 77326056121 is 12165062377.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49823150521 + 27502905600 = 223211^2 + 165840^2 .

It is a cyclic number.

It is not a de Polignac number, because 77326056121 - 2³⁵ = 42966317753 is a prime.

It is not a weakly prime, because it can be changed into another prime (77326056191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38663028060 + 38663028061.

It is an arithmetic number, because the mean of its divisors is an integer number (38663028061).

Almost surely, 2^77326056121 is an apocalyptic number.

It is an amenable number.

77326056121 is a deficient number, since it is larger than the sum of its proper divisors (1).

77326056121 is an equidigital number, since it uses as much as digits as its factorization.

77326056121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 77326056121 in words is "seventy-seven billion, three hundred twenty-six million, fifty-six thousand, one hundred twenty-one".