51555053120 has 56 divisors (see below), whose sum is σ = 125759782008. Its totient is φ = 20119040000.

The previous prime is 51555053113. The next prime is 51555053141. The reversal of 51555053120 is 2135055515.

It can be written as a sum of positive squares in 4 ways, for example, as 2476853824 + 49078199296 = 49768^2 + 221536^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1951631 + ... + 1977870.

It is an arithmetic number, because the mean of its divisors is an integer number (2245710393).

Almost surely, 2^51555053120 is an apocalyptic number.

It is an amenable number.

51555053120 is an abundant number, since it is smaller than the sum of its proper divisors (74204728888).

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

51555053120 is a wasteful number, since it uses less digits than its factorization.

51555053120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3929559 (or 3929549 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 32.

The spelling of 51555053120 in words is "fifty-one billion, five hundred fifty-five million, fifty-three thousand, one hundred twenty".