451979898961 has 2 divisors, whose sum is σ = 451979898962. Its totient is φ = 451979898960.

The previous prime is 451979898907. The next prime is 451979898967. The reversal of 451979898961 is 169898979154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 432332550400 + 19647348561 = 657520^2 + 140169^2 .

It is a cyclic number.

It is not a de Polignac number, because 451979898961 - 2²⁵ = 451946344529 is a prime.

It is not a weakly prime, because it can be changed into another prime (451979898967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225989949480 + 225989949481.

It is an arithmetic number, because the mean of its divisors is an integer number (225989949481).

Almost surely, 2^451979898961 is an apocalyptic number.

It is an amenable number.

451979898961 is a deficient number, since it is larger than the sum of its proper divisors (1).

451979898961 is an equidigital number, since it uses as much as digits as its factorization.

451979898961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352719360, while the sum is 76.

The spelling of 451979898961 in words is "four hundred fifty-one billion, nine hundred seventy-nine million, eight hundred ninety-eight thousand, nine hundred sixty-one".