77736517139 has 2 divisors, whose sum is σ = 77736517140. Its totient is φ = 77736517138.

The previous prime is 77736517127. The next prime is 77736517169. The reversal of 77736517139 is 93171563777.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77736517139 - 2¹⁶ = 77736451603 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (77736517109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38868258569 + 38868258570.

It is an arithmetic number, because the mean of its divisors is an integer number (38868258570).

Almost surely, 2^77736517139 is an apocalyptic number.

77736517139 is a deficient number, since it is larger than the sum of its proper divisors (1).

77736517139 is an equidigital number, since it uses as much as digits as its factorization.

77736517139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5834430, while the sum is 56.

The spelling of 77736517139 in words is "seventy-seven billion, seven hundred thirty-six million, five hundred seventeen thousand, one hundred thirty-nine".