56121823355 has 24 divisors (see below), whose sum is σ = 74161247760. Its totient is φ = 40741334400.

The previous prime is 56121823349. The next prime is 56121823399. The reversal of 56121823355 is 55332812165.

It is a happy number.

It is not a de Polignac number, because 56121823355 - 2⁴ = 56121823339 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 512996 + ... + 612705.

It is an arithmetic number, because the mean of its divisors is an integer number (3090051990).

Almost surely, 2^56121823355 is an apocalyptic number.

56121823355 is a deficient number, since it is larger than the sum of its proper divisors (18039424405).

56121823355 is a wasteful number, since it uses less digits than its factorization.

56121823355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125791 (or 1125778 counting only the distinct ones).

The product of its digits is 216000, while the sum is 41.

The spelling of 56121823355 in words is "fifty-six billion, one hundred twenty-one million, eight hundred twenty-three thousand, three hundred fifty-five".