55865828172 has 192 divisors, whose sum is σ = 169248522240. Its totient is φ = 13916448000.

The previous prime is 55865828171. The next prime is 55865828209. The reversal of 55865828172 is 27182856855.

It is a super-3 number, since 3×55865828172³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (55865828171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4039293 + ... + 4053099.

It is an arithmetic number, because the mean of its divisors is an integer number (881502720).

Almost surely, 2^55865828172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55865828172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84624261120).

55865828172 is an abundant number, since it is smaller than the sum of its proper divisors (113382694068).

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

55865828172 is a wasteful number, since it uses less digits than its factorization.

55865828172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14012 (or 14010 counting only the distinct ones).

The product of its digits is 10752000, while the sum is 57.

The spelling of 55865828172 in words is "fifty-five billion, eight hundred sixty-five million, eight hundred twenty-eight thousand, one hundred seventy-two".