2155875551232 has 192 divisors, whose sum is σ = 6553826173440. Its totient is φ = 624325558272.

The previous prime is 2155875551209. The next prime is 2155875551233. The reversal of 2155875551232 is 2321555785512.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (2155875551233) 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 15 ways as a sum of consecutive naturals, for example, 563953 + ... + 2151695.

It is an arithmetic number, because the mean of its divisors is an integer number (34134511320).

Almost surely, 2^{2155875551232} 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 2155875551232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3276913086720).

2155875551232 is an abundant number, since it is smaller than the sum of its proper divisors (4397950622208).

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

2155875551232 is a wasteful number, since it uses less digits than its factorization.

2155875551232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587798 (or 1587778 counting only the distinct ones).

The product of its digits is 4200000, while the sum is 51.

The spelling of 2155875551232 in words is "two trillion, one hundred fifty-five billion, eight hundred seventy-five million, five hundred fifty-one thousand, two hundred thirty-two".