2151578448 has 60 divisors (see below), whose sum is σ = 6051770400. Its totient is φ = 713579328.

The previous prime is 2151578417. The next prime is 2151578461. The reversal of 2151578448 is 8448751512.

2151578448 is a `hidden beast` number, since 2 + 151 + 57 + 8 + 448 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8886 + ... + 66197.

It is an arithmetic number, because the mean of its divisors is an integer number (100862840).

Almost surely, 2^2151578448 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 2151578448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3025885200).

2151578448 is an abundant number, since it is smaller than the sum of its proper divisors (3900191952).

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

2151578448 is a wasteful number, since it uses less digits than its factorization.

2151578448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75296 (or 75287 counting only the distinct ones).

The product of its digits is 358400, while the sum is 45.

The square root of 2151578448 is about 46385.1101971311. The cubic root of 2151578448 is about 1290.9786552307.

The spelling of 2151578448 in words is "two billion, one hundred fifty-one million, five hundred seventy-eight thousand, four hundred forty-eight".