79077900761 has 2 divisors, whose sum is σ = 79077900762. Its totient is φ = 79077900760.

The previous prime is 79077900743. The next prime is 79077900787. The reversal of 79077900761 is 16700977097.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77830398361 + 1247502400 = 278981^2 + 35320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79077900761 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (79077900061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39538950380 + 39538950381.

It is an arithmetic number, because the mean of its divisors is an integer number (39538950381).

Almost surely, 2^79077900761 is an apocalyptic number.

It is an amenable number.

79077900761 is a deficient number, since it is larger than the sum of its proper divisors (1).

79077900761 is an equidigital number, since it uses as much as digits as its factorization.

79077900761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166886, while the sum is 53.

The spelling of 79077900761 in words is "seventy-nine billion, seventy-seven million, nine hundred thousand, seven hundred sixty-one".