25725716825 has 12 divisors (see below), whose sum is σ = 31923030828. Its totient is φ = 20565643200.

The previous prime is 25725716777. The next prime is 25725716831. The reversal of 25725716825 is 52861752752.

It can be written as a sum of positive squares in 6 ways, for example, as 1841868889 + 23883847936 = 42917^2 + 154544^2 .

It is not a de Polignac number, because 25725716825 - 2¹⁰ = 25725715801 is a prime.

It is a Duffinian 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, 338042 + ... + 407091.

It is an arithmetic number, because the mean of its divisors is an integer number (2660252569).

Almost surely, 2^25725716825 is an apocalyptic number.

25725716825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25725716825 is a deficient number, since it is larger than the sum of its proper divisors (6197314003).

25725716825 is a wasteful number, since it uses less digits than its factorization.

25725716825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746524 (or 746519 counting only the distinct ones).

The product of its digits is 2352000, while the sum is 50.

The spelling of 25725716825 in words is "twenty-five billion, seven hundred twenty-five million, seven hundred sixteen thousand, eight hundred twenty-five".