77907613279 has 2 divisors, whose sum is σ = 77907613280. Its totient is φ = 77907613278.

The previous prime is 77907613261. The next prime is 77907613313. The reversal of 77907613279 is 97231670977.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77907613279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77907613879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38953806639 + 38953806640.

It is an arithmetic number, because the mean of its divisors is an integer number (38953806640).

Almost surely, 2^77907613279 is an apocalyptic number.

77907613279 is a deficient number, since it is larger than the sum of its proper divisors (1).

77907613279 is an equidigital number, since it uses as much as digits as its factorization.

77907613279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7001316, while the sum is 58.

The spelling of 77907613279 in words is "seventy-seven billion, nine hundred seven million, six hundred thirteen thousand, two hundred seventy-nine".