77700080797 has 2 divisors, whose sum is σ = 77700080798. Its totient is φ = 77700080796.

The previous prime is 77700080749. The next prime is 77700080807. The reversal of 77700080797 is 79708000777.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61789033476 + 15911047321 = 248574^2 + 126139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77700080797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77700080707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38850040398 + 38850040399.

It is an arithmetic number, because the mean of its divisors is an integer number (38850040399).

Almost surely, 2^77700080797 is an apocalyptic number.

It is an amenable number.

77700080797 is a deficient number, since it is larger than the sum of its proper divisors (1).

77700080797 is an equidigital number, since it uses as much as digits as its factorization.

77700080797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1210104, while the sum is 52.

The spelling of 77700080797 in words is "seventy-seven billion, seven hundred million, eighty thousand, seven hundred ninety-seven".