2154085469872 has 80 divisors (see below), whose sum is σ = 4793564938240. Its totient is φ = 918577241856.

The previous prime is 2154085469863. The next prime is 2154085469927. The reversal of 2154085469872 is 2789645804512.

It is a self number, because there is not a number n which added to its sum of digits gives 2154085469872.

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, 42627373 + ... + 42677875.

It is an arithmetic number, because the mean of its divisors is an integer number (59919561728).

Almost surely, 2^{2154085469872} 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 2154085469872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2396782469120).

2154085469872 is an abundant number, since it is smaller than the sum of its proper divisors (2639479468368).

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

2154085469872 is a wasteful number, since it uses less digits than its factorization.

2154085469872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52410 (or 52404 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 61.

The spelling of 2154085469872 in words is "two trillion, one hundred fifty-four billion, eighty-five million, four hundred sixty-nine thousand, eight hundred seventy-two".