451440243620161 has 12 divisors (see below), whose sum is σ = 458281735247952. Its totient is φ = 444699407102808.

The previous prime is 451440243620159. The next prime is 451440243620167. The reversal of 451440243620161 is 161026342044154.

It is not a de Polignac number, because 451440243620161 - 2¹ = 451440243620159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (451440243620167) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1066208646 + ... + 1066631968.

It is an arithmetic number, because the mean of its divisors is an integer number (38190144603996).

Almost surely, 2^{451440243620161} is an apocalyptic number.

It is an amenable number.

451440243620161 is a deficient number, since it is larger than the sum of its proper divisors (6841491627791).

451440243620161 is an equidigital number, since it uses as much as digits as its factorization.

451440243620161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661020 (or 660953 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 451440243620161 in words is "four hundred fifty-one trillion, four hundred forty billion, two hundred forty-three million, six hundred twenty thousand, one hundred sixty-one".