56377405481 has 2 divisors, whose sum is σ = 56377405482. Its totient is φ = 56377405480.

The previous prime is 56377405387. The next prime is 56377405493. The reversal of 56377405481 is 18450477365.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47986845481 + 8390560000 = 219059^2 + 91600^2 .

It is a cyclic number.

It is not a de Polignac number, because 56377405481 - 2¹⁴ = 56377389097 is a prime.

It is a super-2 number, since 2×56377405481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56377405681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28188702740 + 28188702741.

It is an arithmetic number, because the mean of its divisors is an integer number (28188702741).

Almost surely, 2^56377405481 is an apocalyptic number.

It is an amenable number.

56377405481 is a deficient number, since it is larger than the sum of its proper divisors (1).

56377405481 is an equidigital number, since it uses as much as digits as its factorization.

56377405481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2822400, while the sum is 50.

The spelling of 56377405481 in words is "fifty-six billion, three hundred seventy-seven million, four hundred five thousand, four hundred eighty-one".