51555425553 has 12 divisors (see below), whose sum is σ = 74638586880. Its totient is φ = 34291988856.

The previous prime is 51555425477. The next prime is 51555425617. The reversal of 51555425553 is 35552455515.

51555425553 is a `hidden beast` number, since 5 + 1 + 5 + 5 + 542 + 55 + 53 = 666.

It is not a de Polignac number, because 51555425553 - 2⁹ = 51555425041 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51555425499 and 51555425508.

It is not an unprimeable number, because it can be changed into a prime (51555425353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6520401 + ... + 6528302.

It is an arithmetic number, because the mean of its divisors is an integer number (6219882240).

Almost surely, 2^51555425553 is an apocalyptic number.

It is an amenable number.

51555425553 is a deficient number, since it is larger than the sum of its proper divisors (23083161327).

51555425553 is a wasteful number, since it uses less digits than its factorization.

51555425553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13049148 (or 13049145 counting only the distinct ones).

The product of its digits is 1875000, while the sum is 45.

The spelling of 51555425553 in words is "fifty-one billion, five hundred fifty-five million, four hundred twenty-five thousand, five hundred fifty-three".