55285120636220 has 48 divisors (see below), whose sum is σ = 122323535997600. Its totient is φ = 20930552928000.

The previous prime is 55285120636211. The next prime is 55285120636237. The reversal of 55285120636220 is 2263602158255.

It is a super-2 number, since 2×55285120636220² (a number of 28 digits) contains 22 as substring.

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, 67642031 + ... + 68454470.

It is an arithmetic number, because the mean of its divisors is an integer number (2548406999950).

Almost surely, 2^{55285120636220} is an apocalyptic number.

It is an amenable number.

55285120636220 is an abundant number, since it is smaller than the sum of its proper divisors (67038415361380).

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

55285120636220 is a wasteful number, since it uses less digits than its factorization.

55285120636220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136097598 (or 136097596 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 47.

The spelling of 55285120636220 in words is "fifty-five trillion, two hundred eighty-five billion, one hundred twenty million, six hundred thirty-six thousand, two hundred twenty".