56837426381 has 2 divisors, whose sum is σ = 56837426382. Its totient is φ = 56837426380.

The previous prime is 56837426339. The next prime is 56837426417. The reversal of 56837426381 is 18362473865.

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., 51277338025 + 5560088356 = 226445^2 + 74566^2 .

It is a cyclic number.

It is not a de Polignac number, because 56837426381 - 2¹⁰ = 56837425357 is a prime.

It is a super-2 number, since 2×56837426381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56837429381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28418713190 + 28418713191.

It is an arithmetic number, because the mean of its divisors is an integer number (28418713191).

Almost surely, 2^56837426381 is an apocalyptic number.

It is an amenable number.

56837426381 is a deficient number, since it is larger than the sum of its proper divisors (1).

56837426381 is an equidigital number, since it uses as much as digits as its factorization.

56837426381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 53.

The spelling of 56837426381 in words is "fifty-six billion, eight hundred thirty-seven million, four hundred twenty-six thousand, three hundred eighty-one".