55401630720 has 176 divisors, whose sum is σ = 178231471200. Its totient is φ = 14687666176.

The previous prime is 55401630703. The next prime is 55401630821. The reversal of 55401630720 is 2703610455.

It is a zygodrome in base 2.

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, 2646856 + ... + 2667704.

Almost surely, 2^55401630720 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 55401630720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89115735600).

55401630720 is an abundant number, since it is smaller than the sum of its proper divisors (122829840480).

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

55401630720 is a wasteful number, since it uses less digits than its factorization.

55401630720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21050 (or 21032 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The spelling of 55401630720 in words is "fifty-five billion, four hundred one million, six hundred thirty thousand, seven hundred twenty".