55550045556 has 72 divisors (see below), whose sum is σ = 146893254144. Its totient is φ = 17666890560.

The previous prime is 55550045521. The next prime is 55550045557. The reversal of 55550045556 is 65554005555.

55550045556 is a `hidden beast` number, since 5 + 5 + 5 + 50 + 0 + 45 + 556 = 666.

It is a super-2 number, since 2×55550045556² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55550045557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 244221 + ... + 413211.

Almost surely, 2^55550045556 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 55550045556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73446627072).

55550045556 is an abundant number, since it is smaller than the sum of its proper divisors (91343208588).

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

55550045556 is a wasteful number, since it uses less digits than its factorization.

55550045556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169421 (or 169416 counting only the distinct ones).

The product of its (nonzero) digits is 1875000, while the sum is 45.

The spelling of 55550045556 in words is "fifty-five billion, five hundred fifty million, forty-five thousand, five hundred fifty-six".