55550721116 has 24 divisors (see below), whose sum is σ = 111633029760. Its totient is φ = 23921362800.

The previous prime is 55550721113. The next prime is 55550721169. The reversal of 55550721116 is 61112705555.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a self number, because there is not a number n which added to its sum of digits gives 55550721116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55550721113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33223280 + ... + 33224951.

It is an arithmetic number, because the mean of its divisors is an integer number (4651376240).

Almost surely, 2^55550721116 is an apocalyptic number.

It is an amenable number.

55550721116 is an abundant number, since it is smaller than the sum of its proper divisors (56082308644).

55550721116 is a wasteful number, since it uses less digits than its factorization.

55550721116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66448265 (or 66448263 counting only the distinct ones).

The product of its (nonzero) digits is 52500, while the sum is 38.

The spelling of 55550721116 in words is "fifty-five billion, five hundred fifty million, seven hundred twenty-one thousand, one hundred sixteen".