55111545225 has 72 divisors (see below), whose sum is σ = 108533148672. Its totient is φ = 26510198400.

The previous prime is 55111545191. The next prime is 55111545241. The reversal of 55111545225 is 52254511155.

55111545225 is a `hidden beast` number, since 551 + 1 + 1 + 54 + 52 + 2 + 5 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-55111545225 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55111545225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 226659 + ... + 401991.

Almost surely, 2^55111545225 is an apocalyptic number.

55111545225 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55111545225 is a deficient number, since it is larger than the sum of its proper divisors (53421603447).

55111545225 is a wasteful number, since it uses less digits than its factorization.

55111545225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175487 (or 175479 counting only the distinct ones).

The product of its digits is 50000, while the sum is 36.

The spelling of 55111545225 in words is "fifty-five billion, one hundred eleven million, five hundred forty-five thousand, two hundred twenty-five".