56380872257 has 2 divisors, whose sum is σ = 56380872258. Its totient is φ = 56380872256.

The previous prime is 56380872221. The next prime is 56380872263. The reversal of 56380872257 is 75227808365.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44148733456 + 12232138801 = 210116^2 + 110599^2 .

It is a cyclic number.

It is not a de Polignac number, because 56380872257 - 2⁸ = 56380872001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56380872199 and 56380872208.

It is not a weakly prime, because it can be changed into another prime (56380872277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28190436128 + 28190436129.

It is an arithmetic number, because the mean of its divisors is an integer number (28190436129).

Almost surely, 2^56380872257 is an apocalyptic number.

It is an amenable number.

56380872257 is a deficient number, since it is larger than the sum of its proper divisors (1).

56380872257 is an equidigital number, since it uses as much as digits as its factorization.

56380872257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5644800, while the sum is 53.

The spelling of 56380872257 in words is "fifty-six billion, three hundred eighty million, eight hundred seventy-two thousand, two hundred fifty-seven".