56734872257 has 16 divisors (see below), whose sum is σ = 65580641280. Its totient is φ = 48076173648.

The previous prime is 56734872251. The next prime is 56734872269. The reversal of 56734872257 is 75227843765.

56734872257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 56734872257 - 2¹⁴ = 56734855873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56734872251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286994 + ... + 442532.

It is an arithmetic number, because the mean of its divisors is an integer number (4098790080).

Almost surely, 2^56734872257 is an apocalyptic number.

It is an amenable number.

56734872257 is a deficient number, since it is larger than the sum of its proper divisors (8845769023).

56734872257 is a wasteful number, since it uses less digits than its factorization.

56734872257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156140.

The product of its digits is 19756800, while the sum is 56.

The spelling of 56734872257 in words is "fifty-six billion, seven hundred thirty-four million, eight hundred seventy-two thousand, two hundred fifty-seven".