56451304371665 has 16 divisors (see below), whose sum is σ = 77439289223808. Its totient is φ = 38699287097856.

The previous prime is 56451304371647. The next prime is 56451304371827. The reversal of 56451304371665 is 56617340315465.

It is not a de Polignac number, because 56451304371665 - 2²⁶ = 56451237262801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56451304371665.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211922432 + ... + 212188641.

It is an arithmetic number, because the mean of its divisors is an integer number (4839955576488).

Almost surely, 2^{56451304371665} is an apocalyptic number.

It is an amenable number.

56451304371665 is a deficient number, since it is larger than the sum of its proper divisors (20987984852143).

56451304371665 is a wasteful number, since it uses less digits than its factorization.

56451304371665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424114888.

The product of its (nonzero) digits is 27216000, while the sum is 56.

The spelling of 56451304371665 in words is "fifty-six trillion, four hundred fifty-one billion, three hundred four million, three hundred seventy-one thousand, six hundred sixty-five".