51551115552 has 96 divisors (see below), whose sum is σ = 158271019200. Its totient is φ = 16279294464.

The previous prime is 51551115547. The next prime is 51551115569. The reversal of 51551115552 is 25551115515.

51551115552 is a `hidden beast` number, since 5 + 1 + 551 + 1 + 1 + 55 + 52 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1553733 + ... + 1586564.

It is an arithmetic number, because the mean of its divisors is an integer number (1648656450).

Almost surely, 2^51551115552 is an apocalyptic number.

It is an amenable number.

51551115552 is an abundant number, since it is smaller than the sum of its proper divisors (106719903648).

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

51551115552 is a wasteful number, since it uses less digits than its factorization.

51551115552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140335 (or 3140321 counting only the distinct ones).

The product of its digits is 31250, while the sum is 36.

The spelling of 51551115552 in words is "fifty-one billion, five hundred fifty-one million, one hundred fifteen thousand, five hundred fifty-two".