55357680 has 160 divisors (see below), whose sum is σ = 198987264. Its totient is φ = 12469248.

The previous prime is 55357663. The next prime is 55357691. The reversal of 55357680 is 8675355.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139242 + ... + 139638.

Almost surely, 2^55357680 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 55357680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99493632).

55357680 is an abundant number, since it is smaller than the sum of its proper divisors (143629584).

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

55357680 is a wasteful number, since it uses less digits than its factorization.

55357680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 55357680 is about 7440.2741884960. The cubic root of 55357680 is about 381.1178533324.

The spelling of 55357680 in words is "fifty-five million, three hundred fifty-seven thousand, six hundred eighty".