51895118025 has 27 divisors (see below), whose sum is σ = 92956043271. Its totient is φ = 27675573840.

The previous prime is 51895118003. The next prime is 51895118059. The reversal of 51895118025 is 52081159815.

It is a happy number.

The square root of 51895118025 is 227805.

It is a perfect power (a square), and thus also a powerful number.

51895118025 is a `hidden beast` number, since 51 + 8 + 9 + 511 + 80 + 2 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18682242489 + 33212875536 = 136683^2 + 182244^2 .

It is not a de Polignac number, because 51895118025 - 2⁵ = 51895117993 is a prime.

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

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3409482 + ... + 3424668.

Almost surely, 2^51895118025 is an apocalyptic number.

51895118025 is the 227805-th square number.

51895118025 is the 113903-rd centered octagonal number.

It is an amenable number.

51895118025 is a deficient number, since it is larger than the sum of its proper divisors (41060925246).

51895118025 is an frugal number, since it uses more digits than its factorization.

51895118025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30390 (or 15195 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 45.

The spelling of 51895118025 in words is "fifty-one billion, eight hundred ninety-five million, one hundred eighteen thousand, twenty-five".