56511955225 has 12 divisors (see below), whose sum is σ = 76445263440. Its totient is φ = 41099603600.

The previous prime is 56511955223. The next prime is 56511955243. The reversal of 56511955225 is 52255911565.

It is not a de Polignac number, because 56511955225 - 2¹ = 56511955223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56511955223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102748735 + ... + 102749284.

It is an arithmetic number, because the mean of its divisors is an integer number (6370438620).

Almost surely, 2^56511955225 is an apocalyptic number.

56511955225 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56511955225 is a deficient number, since it is larger than the sum of its proper divisors (19933308215).

56511955225 is a wasteful number, since it uses less digits than its factorization.

56511955225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205498040 (or 205498035 counting only the distinct ones).

The product of its digits is 675000, while the sum is 46.

The spelling of 56511955225 in words is "fifty-six billion, five hundred eleven million, nine hundred fifty-five thousand, two hundred twenty-five".