51755519025 has 192 divisors, whose sum is σ = 110627840000. Its totient is φ = 23525121600.

The previous prime is 51755519021. The next prime is 51755519069. The reversal of 51755519025 is 52091555715.

51755519025 is a `hidden beast` number, since 5 + 1 + 7 + 5 + 551 + 90 + 2 + 5 = 666.

It is not a de Polignac number, because 51755519025 - 2² = 51755519021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51755519021) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 103718226 + ... + 103718724.

Almost surely, 2^51755519025 is an apocalyptic number.

It is an amenable number.

51755519025 is an abundant number, since it is smaller than the sum of its proper divisors (58872320975).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51755519025 is an equidigital number, since it uses as much as digits as its factorization.

51755519025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808 (or 785 counting only the distinct ones).

The product of its (nonzero) digits is 393750, while the sum is 45.

The spelling of 51755519025 in words is "fifty-one billion, seven hundred fifty-five million, five hundred nineteen thousand, twenty-five".