77400990179 has 2 divisors, whose sum is σ = 77400990180. Its totient is φ = 77400990178.

The previous prime is 77400990127. The next prime is 77400990181. The reversal of 77400990179 is 97109900477.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77400990179 - 2⁸ = 77400989923 is a prime.

Together with 77400990181, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77400990179.

It is not a weakly prime, because it can be changed into another prime (77400990379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38700495089 + 38700495090.

It is an arithmetic number, because the mean of its divisors is an integer number (38700495090).

Almost surely, 2^77400990179 is an apocalyptic number.

77400990179 is a deficient number, since it is larger than the sum of its proper divisors (1).

77400990179 is an equidigital number, since it uses as much as digits as its factorization.

77400990179 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1000188, while the sum is 53.

The spelling of 77400990179 in words is "seventy-seven billion, four hundred million, nine hundred ninety thousand, one hundred seventy-nine".