51655435344 has 100 divisors (see below), whose sum is σ = 150121981856. Its totient is φ = 17218373472.

The previous prime is 51655435333. The next prime is 51655435373. The reversal of 51655435344 is 44353455615.

It is a happy number.

51655435344 is a `hidden beast` number, since 5 + 1 + 6 + 554 + 3 + 53 + 44 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 51655435344.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 232917 + ... + 396939.

Almost surely, 2^51655435344 is an apocalyptic number.

51655435344 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51655435344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75060990928).

51655435344 is an abundant number, since it is smaller than the sum of its proper divisors (98466546512).

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

51655435344 is an frugal number, since it uses more digits than its factorization.

51655435344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164058 (or 164028 counting only the distinct ones).

The product of its digits is 2160000, while the sum is 45.

The spelling of 51655435344 in words is "fifty-one billion, six hundred fifty-five million, four hundred thirty-five thousand, three hundred forty-four".