77120315983 has 2 divisors, whose sum is σ = 77120315984. Its totient is φ = 77120315982.

The previous prime is 77120315971. The next prime is 77120316029. The reversal of 77120315983 is 38951302177.

It is an a-pointer prime, because the next prime (77120316029) can be obtained adding 77120315983 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77120315983 - 2²⁵ = 77086761551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77120315383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38560157991 + 38560157992.

It is an arithmetic number, because the mean of its divisors is an integer number (38560157992).

Almost surely, 2^77120315983 is an apocalyptic number.

77120315983 is a deficient number, since it is larger than the sum of its proper divisors (1).

77120315983 is an equidigital number, since it uses as much as digits as its factorization.

77120315983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 77120315983 in words is "seventy-seven billion, one hundred twenty million, three hundred fifteen thousand, nine hundred eighty-three".