2154853575972 has 72 divisors (see below), whose sum is σ = 5580198962520. Its totient is φ = 700720865280.

The previous prime is 2154853575971. The next prime is 2154853575989. The reversal of 2154853575972 is 2795753584512.

2154853575972 is a `hidden beast` number, since 2 + 1 + 5 + 4 + 8 + 5 + 35 + 7 + 597 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 28809630756 + 2126043945216 = 169734^2 + 1458096^2 .

It is not an unprimeable number, because it can be changed into a prime (2154853575971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29615028 + ... + 29687700.

Almost surely, 2^{2154853575972} is an apocalyptic number.

It is an amenable number.

2154853575972 is an abundant number, since it is smaller than the sum of its proper divisors (3425345386548).

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

2154853575972 is a wasteful number, since it uses less digits than its factorization.

2154853575972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92813 (or 92808 counting only the distinct ones).

The product of its digits is 105840000, while the sum is 63.

The spelling of 2154853575972 in words is "two trillion, one hundred fifty-four billion, eight hundred fifty-three million, five hundred seventy-five thousand, nine hundred seventy-two".