2572578450 has 144 divisors (see below), whose sum is σ = 7493411016. Its totient is φ = 628992000.

The previous prime is 2572578413. The next prime is 2572578457. The reversal of 2572578450 is 548752752.

2572578450 is a `hidden beast` number, since 2 + 5 + 72 + 578 + 4 + 5 + 0 = 666.

2572578450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 5433561 + 2567144889 = 2331^2 + 50667^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2572578396 and 2572578405.

It is not an unprimeable number, because it can be changed into a prime (2572578457) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 917050 + ... + 919850.

Almost surely, 2^2572578450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2572578450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3746705508).

2572578450 is an abundant number, since it is smaller than the sum of its proper divisors (4920832566).

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

2572578450 is a wasteful number, since it uses less digits than its factorization.

2572578450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2989 (or 2981 counting only the distinct ones).

The product of its (nonzero) digits is 784000, while the sum is 45.

The square root of 2572578450 is about 50720.5919720975. The cubic root of 2572578450 is about 1370.2176026742.

The spelling of 2572578450 in words is "two billion, five hundred seventy-two million, five hundred seventy-eight thousand, four hundred fifty".