25724515725 has 36 divisors (see below), whose sum is σ = 46095281856. Its totient is φ = 13713841440.

The previous prime is 25724515717. The next prime is 25724515741. The reversal of 25724515725 is 52751542752.

25724515725 is a `hidden beast` number, since 2 + 5 + 7 + 24 + 51 + 572 + 5 = 666.

It is not a de Polignac number, because 25724515725 - 2³ = 25724515717 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 35 ways as a sum of consecutive naturals, for example, 527214 + ... + 573936.

It is an arithmetic number, because the mean of its divisors is an integer number (1280424496).

Almost surely, 2^25724515725 is an apocalyptic number.

25724515725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25724515725 is a deficient number, since it is larger than the sum of its proper divisors (20370766131).

25724515725 is a wasteful number, since it uses less digits than its factorization.

25724515725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49186 (or 49178 counting only the distinct ones).

The product of its digits is 980000, while the sum is 45.

The spelling of 25724515725 in words is "twenty-five billion, seven hundred twenty-four million, five hundred fifteen thousand, seven hundred twenty-five".