77508767128379 has 2 divisors, whose sum is σ = 77508767128380. Its totient is φ = 77508767128378.

The previous prime is 77508767128291. The next prime is 77508767128381. The reversal of 77508767128379 is 97382176780577.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77508767128379 - 2²⁸ = 77508498692923 is a prime.

It is a super-2 number, since 2×77508767128379² (a number of 29 digits) contains 22 as substring.

Together with 77508767128381, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77508767128979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38754383564189 + 38754383564190.

It is an arithmetic number, because the mean of its divisors is an integer number (38754383564190).

Almost surely, 2^{77508767128379} is an apocalyptic number.

77508767128379 is a deficient number, since it is larger than the sum of its proper divisors (1).

77508767128379 is an equidigital number, since it uses as much as digits as its factorization.

77508767128379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1742549760, while the sum is 77.

The spelling of 77508767128379 in words is "seventy-seven trillion, five hundred eight billion, seven hundred sixty-seven million, one hundred twenty-eight thousand, three hundred seventy-nine".