56457731361 has 4 divisors (see below), whose sum is σ = 75276975152. Its totient is φ = 37638487572.

The previous prime is 56457731329. The next prime is 56457731377. The reversal of 56457731361 is 16313775465.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 56457731361 - 2⁵ = 56457731329 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 56457731361.

It is not an unprimeable number, because it can be changed into a prime (56457731261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9409621891 + ... + 9409621896.

It is an arithmetic number, because the mean of its divisors is an integer number (18819243788).

Almost surely, 2^56457731361 is an apocalyptic number.

It is an amenable number.

56457731361 is a deficient number, since it is larger than the sum of its proper divisors (18819243791).

56457731361 is a wasteful number, since it uses less digits than its factorization.

56457731361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18819243790.

The product of its digits is 1587600, while the sum is 48.

The spelling of 56457731361 in words is "fifty-six billion, four hundred fifty-seven million, seven hundred thirty-one thousand, three hundred sixty-one".