55554728790 has 128 divisors (see below), whose sum is σ = 149427224064. Its totient is φ = 13213200000.

The previous prime is 55554728777. The next prime is 55554728833. The reversal of 55554728790 is 9782745555.

It is a self number, because there is not a number n which added to its sum of digits gives 55554728790.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2103165 + ... + 2129415.

It is an arithmetic number, because the mean of its divisors is an integer number (1167400188).

Almost surely, 2^55554728790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55554728790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74713612032).

55554728790 is an abundant number, since it is smaller than the sum of its proper divisors (93872495274).

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

55554728790 is a wasteful number, since it uses less digits than its factorization.

55554728790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26347 (or 26325 counting only the distinct ones).

The product of its (nonzero) digits is 17640000, while the sum is 57.

The spelling of 55554728790 in words is "fifty-five billion, five hundred fifty-four million, seven hundred twenty-eight thousand, seven hundred ninety".