25780525525 has 6 divisors (see below), whose sum is σ = 31967851682. Its totient is φ = 20624420400.

The previous prime is 25780525447. The next prime is 25780525571. The reversal of 25780525525 is 52552508752.

It can be written as a sum of positive squares in 3 ways, for example, as 8965438596 + 16815086929 = 94686^2 + 129673^2 .

It is not a de Polignac number, because 25780525525 - 2¹⁵ = 25780492757 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, 515610486 + ... + 515610535.

Almost surely, 2^25780525525 is an apocalyptic number.

25780525525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25780525525 is a deficient number, since it is larger than the sum of its proper divisors (6187326157).

25780525525 is a wasteful number, since it uses less digits than its factorization.

25780525525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031221031 (or 1031221026 counting only the distinct ones).

The product of its (nonzero) digits is 1400000, while the sum is 46.

The spelling of 25780525525 in words is "twenty-five billion, seven hundred eighty million, five hundred twenty-five thousand, five hundred twenty-five".