51895121004 has 36 divisors (see below), whose sum is σ = 132014885184. Its totient is φ = 17188191072.

The previous prime is 51895120993. The next prime is 51895121011. The reversal of 51895121004 is 40012159815.

51895121004 is a `hidden beast` number, since 51 + 89 + 512 + 10 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51895121004.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4585212 + ... + 4596515.

It is an arithmetic number, because the mean of its divisors is an integer number (3667080144).

Almost surely, 2^51895121004 is an apocalyptic number.

It is an amenable number.

51895121004 is an abundant number, since it is smaller than the sum of its proper divisors (80119764180).

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

51895121004 is a wasteful number, since it uses less digits than its factorization.

51895121004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9181894 (or 9181889 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The spelling of 51895121004 in words is "fifty-one billion, eight hundred ninety-five million, one hundred twenty-one thousand, four".