18416960977 has 2 divisors, whose sum is σ = 18416960978. Its totient is φ = 18416960976.

The previous prime is 18416960957. The next prime is 18416961019. The reversal of 18416960977 is 77906961481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15487553601 + 2929407376 = 124449^2 + 54124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18416960977 is a prime.

It is not a weakly prime, because it can be changed into another prime (18416960917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9208480488 + 9208480489.

It is an arithmetic number, because the mean of its divisors is an integer number (9208480489).

Almost surely, 2^18416960977 is an apocalyptic number.

It is an amenable number.

18416960977 is a deficient number, since it is larger than the sum of its proper divisors (1).

18416960977 is an equidigital number, since it uses as much as digits as its factorization.

18416960977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4572288, while the sum is 58.

The spelling of 18416960977 in words is "eighteen billion, four hundred sixteen million, nine hundred sixty thousand, nine hundred seventy-seven".