51207176172 has 96 divisors (see below), whose sum is σ = 125753564160. Its totient is φ = 16186579200.

The previous prime is 51207176171. The next prime is 51207176179. The reversal of 51207176172 is 27167170215.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 51207176172.

It is not an unprimeable number, because it can be changed into a prime (51207176171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29547418 + ... + 29549150.

It is an arithmetic number, because the mean of its divisors is an integer number (1309932960).

Almost surely, 2^51207176172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51207176172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62876782080).

51207176172 is an abundant number, since it is smaller than the sum of its proper divisors (74546387988).

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

51207176172 is a wasteful number, since it uses less digits than its factorization.

51207176172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2623 (or 2621 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 39.

The spelling of 51207176172 in words is "fifty-one billion, two hundred seven million, one hundred seventy-six thousand, one hundred seventy-two".