77736974923 has 2 divisors, whose sum is σ = 77736974924. Its totient is φ = 77736974922.

The previous prime is 77736974899. The next prime is 77736974933. The reversal of 77736974923 is 32947963777.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77736974923 - 2³³ = 69147040331 is a prime.

It is not a weakly prime, because it can be changed into another prime (77736974933) 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, 38868487461 + 38868487462.

It is an arithmetic number, because the mean of its divisors is an integer number (38868487462).

Almost surely, 2^77736974923 is an apocalyptic number.

77736974923 is a deficient number, since it is larger than the sum of its proper divisors (1).

77736974923 is an equidigital number, since it uses as much as digits as its factorization.

77736974923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84015792, while the sum is 64.

It can be divided in two parts, 777 and 36974923, that added together give a triangular number (36975700 = T₈₅₉₉).

The spelling of 77736974923 in words is "seventy-seven billion, seven hundred thirty-six million, nine hundred seventy-four thousand, nine hundred twenty-three".