55571020257500 has 120 divisors (see below), whose sum is σ = 133459968826800. Its totient is φ = 20072020480000.

The previous prime is 55571020257497. The next prime is 55571020257517. The reversal of 55571020257500 is 575202017555.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2683589 + ... + 10878588.

It is an arithmetic number, because the mean of its divisors is an integer number (1112166406890).

Almost surely, 2^{55571020257500} is an apocalyptic number.

55571020257500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55571020257500 is an abundant number, since it is smaller than the sum of its proper divisors (77888948569300).

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

55571020257500 is a wasteful number, since it uses less digits than its factorization.

55571020257500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13562361 (or 13562344 counting only the distinct ones).

The product of its (nonzero) digits is 612500, while the sum is 44.

The spelling of 55571020257500 in words is "fifty-five trillion, five hundred seventy-one billion, twenty million, two hundred fifty-seven thousand, five hundred".