51069108825 has 120 divisors (see below), whose sum is σ = 114471637632. Its totient is φ = 21972487680.

The previous prime is 51069108821. The next prime is 51069108863. The reversal of 51069108825 is 52880196015.

It is a happy number.

51069108825 is a `hidden beast` number, since 510 + 6 + 9 + 108 + 8 + 25 = 666.

It is not a de Polignac number, because 51069108825 - 2² = 51069108821 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 Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51069108821) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 135012 + ... + 346938.

Almost surely, 2^51069108825 is an apocalyptic number.

It is an amenable number.

51069108825 is an abundant number, since it is smaller than the sum of its proper divisors (63402528807).

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

51069108825 is a wasteful number, since it uses less digits than its factorization.

51069108825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211973 (or 211959 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 45.

The spelling of 51069108825 in words is "fifty-one billion, sixty-nine million, one hundred eight thousand, eight hundred twenty-five".