51556104852 has 96 divisors (see below), whose sum is σ = 141552956160. Its totient is φ = 14297902080.

The previous prime is 51556104823. The next prime is 51556104877. The reversal of 51556104852 is 25840165515.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 31 ways as a sum of consecutive naturals, for example, 640474 + ... + 716462.

It is an arithmetic number, because the mean of its divisors is an integer number (1474509960).

Almost surely, 2^51556104852 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51556104852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70776478080).

51556104852 is an abundant number, since it is smaller than the sum of its proper divisors (89996851308).

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

51556104852 is a wasteful number, since it uses less digits than its factorization.

51556104852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76241 (or 76239 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 42.

The spelling of 51556104852 in words is "fifty-one billion, five hundred fifty-six million, one hundred four thousand, eight hundred fifty-two".