56139000077 has 2 divisors, whose sum is σ = 56139000078. Its totient is φ = 56139000076.

The previous prime is 56139000053. The next prime is 56139000131. The reversal of 56139000077 is 77000093165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28268033161 + 27870966916 = 168131^2 + 166946^2 .

It is a cyclic number.

It is not a de Polignac number, because 56139000077 - 2⁶ = 56139000013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56139000077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56139000017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28069500038 + 28069500039.

It is an arithmetic number, because the mean of its divisors is an integer number (28069500039).

Almost surely, 2^56139000077 is an apocalyptic number.

It is an amenable number.

56139000077 is a deficient number, since it is larger than the sum of its proper divisors (1).

56139000077 is an equidigital number, since it uses as much as digits as its factorization.

56139000077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39690, while the sum is 38.

The spelling of 56139000077 in words is "fifty-six billion, one hundred thirty-nine million, seventy-seven", and thus it is an aban number.