56356421055 has 128 divisors (see below), whose sum is σ = 105215265792. Its totient is φ = 25505280000.

The previous prime is 56356420993. The next prime is 56356421059. The reversal of 56356421055 is 55012465365.

It is not a de Polignac number, because 56356421055 - 2²² = 56352226751 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56356420998 and 56356421016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56356421059) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 15266760 + ... + 15270450.

It is an arithmetic number, because the mean of its divisors is an integer number (821994264).

Almost surely, 2^56356421055 is an apocalyptic number.

56356421055 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

56356421055 is a deficient number, since it is larger than the sum of its proper divisors (48858844737).

56356421055 is a wasteful number, since it uses less digits than its factorization.

56356421055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3849.

The product of its (nonzero) digits is 540000, while the sum is 42.

The spelling of 56356421055 in words is "fifty-six billion, three hundred fifty-six million, four hundred twenty-one thousand, fifty-five".