51555305532 has 48 divisors (see below), whose sum is σ = 127532367872. Its totient is φ = 16181259840.

The previous prime is 51555305509. The next prime is 51555305567. The reversal of 51555305532 is 23550355515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1859068 + ... + 1886595.

Almost surely, 2^51555305532 is an apocalyptic number.

It is an amenable number.

51555305532 is an abundant number, since it is smaller than the sum of its proper divisors (75977062340).

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

51555305532 is a wasteful number, since it uses less digits than its factorization.

51555305532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3745738 (or 3745736 counting only the distinct ones).

The product of its (nonzero) digits is 281250, while the sum is 39.

The spelling of 51555305532 in words is "fifty-one billion, five hundred fifty-five million, three hundred five thousand, five hundred thirty-two".