51855208632 has 24 divisors (see below), whose sum is σ = 140441190240. Its totient is φ = 17285069520.

The previous prime is 51855208571. The next prime is 51855208663. The reversal of 51855208632 is 23680255815.

51855208632 is a `hidden beast` number, since 5 + 1 + 8 + 5 + 5 + 2 + 0 + 8 + 632 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×51855208632² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 360105544 + ... + 360105687.

It is an arithmetic number, because the mean of its divisors is an integer number (5851716260).

Almost surely, 2^51855208632 is an apocalyptic number.

It is an amenable number.

51855208632 is an abundant number, since it is smaller than the sum of its proper divisors (88585981608).

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

51855208632 is a wasteful number, since it uses less digits than its factorization.

51855208632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720211243 (or 720211236 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 45.

The spelling of 51855208632 in words is "fifty-one billion, eight hundred fifty-five million, two hundred eight thousand, six hundred thirty-two".