51999933170952 has 160 divisors (see below), whose sum is σ = 157012219287000. Its totient is φ = 15983600265216.

The previous prime is 51999933170923. The next prime is 51999933170971. The reversal of 51999933170952 is 25907133999915.

51999933170952 is a `hidden beast` number, since 5 + 1 + 99 + 99 + 331 + 70 + 9 + 52 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 46993410570276 + 5006522600676 = 6855174^2 + 2237526^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5071174 + ... + 11389322.

Almost surely, 2^{51999933170952} is an apocalyptic number.

51999933170952 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51999933170952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78506109643500).

51999933170952 is an abundant number, since it is smaller than the sum of its proper divisors (105012286116048).

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

51999933170952 is a wasteful number, since it uses less digits than its factorization.

51999933170952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6319157 (or 6319144 counting only the distinct ones).

The product of its (nonzero) digits is 186004350, while the sum is 72.

The spelling of 51999933170952 in words is "fifty-one trillion, nine hundred ninety-nine billion, nine hundred thirty-three million, one hundred seventy thousand, nine hundred fifty-two".