2154569472 has 216 divisors, whose sum is σ = 6833893248. Its totient is φ = 647424000.

The previous prime is 2154569453. The next prime is 2154569489. The reversal of 2154569472 is 2749654512.

2154569472 is a `hidden beast` number, since 2 + 1 + 545 + 69 + 47 + 2 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3826663 + ... + 3827225.

Almost surely, 2^2154569472 is an apocalyptic number.

2154569472 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2154569472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3416946624).

2154569472 is an abundant number, since it is smaller than the sum of its proper divisors (4679323776).

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

2154569472 is a wasteful number, since it uses less digits than its factorization.

2154569472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747 (or 730 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 2154569472 is about 46417.3402081593. The cubic root of 2154569472 is about 1291.5765976756.

The spelling of 2154569472 in words is "two billion, one hundred fifty-four million, five hundred sixty-nine thousand, four hundred seventy-two".