55853387920 has 40 divisors (see below), whose sum is σ = 141664504320. Its totient is φ = 20310322560.

The previous prime is 55853387917. The next prime is 55853387939. The reversal of 55853387920 is 2978335855.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (55).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31734000 + ... + 31735759.

It is an arithmetic number, because the mean of its divisors is an integer number (3541612608).

Almost surely, 2^55853387920 is an apocalyptic number.

It is an amenable number.

55853387920 is an abundant number, since it is smaller than the sum of its proper divisors (85811116400).

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

55853387920 is a wasteful number, since it uses less digits than its factorization.

55853387920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63469783 (or 63469777 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 55.

The spelling of 55853387920 in words is "fifty-five billion, eight hundred fifty-three million, three hundred eighty-seven thousand, nine hundred twenty".