55911671220 has 48 divisors (see below), whose sum is σ = 156924609408. Its totient is φ = 14874357120.

The previous prime is 55911671201. The next prime is 55911671243. The reversal of 55911671220 is 2217611955.

It is a super-2 number, since 2×55911671220² (a number of 22 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, 1081464 + ... + 1131983.

It is an arithmetic number, because the mean of its divisors is an integer number (3269262696).

Almost surely, 2^55911671220 is an apocalyptic number.

It is an amenable number.

55911671220 is an abundant number, since it is smaller than the sum of its proper divisors (101012938188).

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

55911671220 is a wasteful number, since it uses less digits than its factorization.

55911671220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213880 (or 2213878 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 39.

The spelling of 55911671220 in words is "fifty-five billion, nine hundred eleven million, six hundred seventy-one thousand, two hundred twenty".