55621446608 has 80 divisors (see below), whose sum is σ = 132706506240. Its totient is φ = 21992352768.

The previous prime is 55621446589. The next prime is 55621446703. The reversal of 55621446608 is 80664412655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3032441 + ... + 3050727.

It is an arithmetic number, because the mean of its divisors is an integer number (1658831328).

Almost surely, 2^55621446608 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 55621446608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66353253120).

55621446608 is an abundant number, since it is smaller than the sum of its proper divisors (77085059632).

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

55621446608 is a wasteful number, since it uses less digits than its factorization.

55621446608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20404 (or 20398 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 47.

The spelling of 55621446608 in words is "fifty-five billion, six hundred twenty-one million, four hundred forty-six thousand, six hundred eight".