55581841020 has 48 divisors (see below), whose sum is σ = 164783814048. Its totient is φ = 13949952000.

The previous prime is 55581840991. The next prime is 55581841031. The reversal of 55581841020 is 2014818555.

It is a self number, because there is not a number n which added to its sum of digits gives 55581841020.

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, 27244981 + ... + 27247020.

It is an arithmetic number, because the mean of its divisors is an integer number (3432996126).

Almost surely, 2^55581841020 is an apocalyptic number.

It is an amenable number.

55581841020 is an abundant number, since it is smaller than the sum of its proper divisors (109201973028).

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

55581841020 is a wasteful number, since it uses less digits than its factorization.

55581841020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54492030 (or 54492028 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 39.

The spelling of 55581841020 in words is "fifty-five billion, five hundred eighty-one million, eight hundred forty-one thousand, twenty".