25785325525 has 6 divisors (see below), whose sum is σ = 31973803682. Its totient is φ = 20628260400.

The previous prime is 25785325513. The next prime is 25785325537. The reversal of 25785325525 is 52552358752.

It is an interprime number because it is at equal distance from previous prime (25785325513) and next prime (25785325537).

It can be written as a sum of positive squares in 3 ways, for example, as 785288529 + 25000036996 = 28023^2 + 158114^2 .

It is not a de Polignac number, because 25785325525 - 2¹³ = 25785317333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 515706486 + ... + 515706535.

Almost surely, 2^25785325525 is an apocalyptic number.

25785325525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25785325525 is a deficient number, since it is larger than the sum of its proper divisors (6188478157).

25785325525 is a wasteful number, since it uses less digits than its factorization.

25785325525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031413031 (or 1031413026 counting only the distinct ones).

The product of its digits is 4200000, while the sum is 49.

The spelling of 25785325525 in words is "twenty-five billion, seven hundred eighty-five million, three hundred twenty-five thousand, five hundred twenty-five".