55513251216 has 120 divisors (see below), whose sum is σ = 165507844320. Its totient is φ = 17319218688.

The previous prime is 55513251203. The next prime is 55513251221. The reversal of 55513251216 is 61215231555.

55513251216 is a `hidden beast` number, since 5 + 5 + 5 + 132 + 512 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104860 + ... + 349316.

It is an arithmetic number, because the mean of its divisors is an integer number (1379232036).

Almost surely, 2^55513251216 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 55513251216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82753922160).

55513251216 is an abundant number, since it is smaller than the sum of its proper divisors (109994593104).

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

55513251216 is a wasteful number, since it uses less digits than its factorization.

55513251216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244573 (or 244564 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

The spelling of 55513251216 in words is "fifty-five billion, five hundred thirteen million, two hundred fifty-one thousand, two hundred sixteen".