51554105544 has 64 divisors (see below), whose sum is σ = 135812203200. Its totient is φ = 16263023616.

The previous prime is 51554105521. The next prime is 51554105587. The reversal of 51554105544 is 44550145515.

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, 375252 + ... + 493884.

It is an arithmetic number, because the mean of its divisors is an integer number (2122065675).

Almost surely, 2^51554105544 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 51554105544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67906101600).

51554105544 is an abundant number, since it is smaller than the sum of its proper divisors (84258097656).

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

51554105544 is a wasteful number, since it uses less digits than its factorization.

51554105544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119614 (or 119610 counting only the distinct ones).

The product of its (nonzero) digits is 200000, while the sum is 39.

The spelling of 51554105544 in words is "fifty-one billion, five hundred fifty-four million, one hundred five thousand, five hundred forty-four".