51501925806 has 32 divisors (see below), whose sum is σ = 108440726400. Its totient is φ = 16261423200.

The previous prime is 51501925801. The next prime is 51501925807. The reversal of 51501925806 is 60852910515.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51501925801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 872125 + ... + 929303.

It is an arithmetic number, because the mean of its divisors is an integer number (3388772700).

Almost surely, 2^51501925806 is an apocalyptic number.

51501925806 is an abundant number, since it is smaller than the sum of its proper divisors (56938800594).

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

51501925806 is a wasteful number, since it uses less digits than its factorization.

51501925806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65104.

The product of its (nonzero) digits is 108000, while the sum is 42.

The spelling of 51501925806 in words is "fifty-one billion, five hundred one million, nine hundred twenty-five thousand, eight hundred six".