55323621108 has 450 divisors, whose sum is σ = 178972656786. Its totient is φ = 14898800448.

The previous prime is 55323621103. The next prime is 55323621139. The reversal of 55323621108 is 80112632355.

55323621108 is a `hidden beast` number, since 5 + 5 + 3 + 23 + 621 + 1 + 0 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 55042790544 + 280830564 = 234612^2 + 16758^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55323621103) by changing a digit.

It is a polite number, since it can be written in 149 ways as a sum of consecutive naturals, for example, 280830466 + ... + 280830662.

Almost surely, 2^55323621108 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 55323621108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89486328393).

55323621108 is an abundant number, since it is smaller than the sum of its proper divisors (123649035678).

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

55323621108 is a wasteful number, since it uses less digits than its factorization.

55323621108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 55323621108 in words is "fifty-five billion, three hundred twenty-three million, six hundred twenty-one thousand, one hundred eight".