2528743725 has 144 divisors (see below), whose sum is σ = 5091787200. Its totient is φ = 1226119680.

The previous prime is 2528743709. The next prime is 2528743747. The reversal of 2528743725 is 5273478252.

2528743725 is a `hidden beast` number, since 2 + 528 + 74 + 37 + 25 = 666.

2528743725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2528743725 - 2⁴ = 2528743709 is a prime.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 34640289 + ... + 34640361.

Almost surely, 2^2528743725 is an apocalyptic number.

2528743725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2528743725 is an abundant number, since it is smaller than the sum of its proper divisors (2563043475).

2528743725 is a wasteful number, since it uses less digits than its factorization.

2528743725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 137 counting only the distinct ones).

The product of its digits is 940800, while the sum is 45.

The square root of 2528743725 is about 50286.6157640380. The cubic root of 2528743725 is about 1362.3904981717.

The spelling of 2528743725 in words is "two billion, five hundred twenty-eight million, seven hundred forty-three thousand, seven hundred twenty-five".