56745607121281 has 32 divisors (see below), whose sum is σ = 62447671706112. Its totient is φ = 51240547987200.

The previous prime is 56745607121233. The next prime is 56745607121297. The reversal of 56745607121281 is 18212170654765.

It is not a de Polignac number, because 56745607121281 - 2³⁷ = 56608168167809 is a prime.

It is a super-2 number, since 2×56745607121281² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56745607181281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 443430856 + ... + 443558806.

It is an arithmetic number, because the mean of its divisors is an integer number (1951489740816).

Almost surely, 2^{56745607121281} is an apocalyptic number.

It is an amenable number.

56745607121281 is a deficient number, since it is larger than the sum of its proper divisors (5702064584831).

56745607121281 is a wasteful number, since it uses less digits than its factorization.

56745607121281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129913.

The product of its (nonzero) digits is 5644800, while the sum is 55.

The spelling of 56745607121281 in words is "fifty-six trillion, seven hundred forty-five billion, six hundred seven million, one hundred twenty-one thousand, two hundred eighty-one".