74989718977 has 2 divisors, whose sum is σ = 74989718978. Its totient is φ = 74989718976.

The previous prime is 74989718873. The next prime is 74989718981. The reversal of 74989718977 is 77981798947.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71611900816 + 3377818161 = 267604^2 + 58119^2 .

It is a cyclic number.

It is not a de Polignac number, because 74989718977 - 2⁷ = 74989718849 is a prime.

It is not a weakly prime, because it can be changed into another prime (74989718987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37494859488 + 37494859489.

It is an arithmetic number, because the mean of its divisors is an integer number (37494859489).

Almost surely, 2^74989718977 is an apocalyptic number.

It is an amenable number.

74989718977 is a deficient number, since it is larger than the sum of its proper divisors (1).

74989718977 is an equidigital number, since it uses as much as digits as its factorization.

74989718977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 448084224, while the sum is 76.

The spelling of 74989718977 in words is "seventy-four billion, nine hundred eighty-nine million, seven hundred eighteen thousand, nine hundred seventy-seven".