25807990772 has 12 divisors (see below), whose sum is σ = 45168432036. Its totient is φ = 12902724480.

The previous prime is 25807990739. The next prime is 25807990783. The reversal of 25807990772 is 27709970852.

It can be written as a sum of positive squares in 2 ways, for example, as 7673059216 + 18134931556 = 87596^2 + 134666^2 .

It is a super-3 number, since 3×25807990772³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271283 + ... + 353850.

It is an arithmetic number, because the mean of its divisors is an integer number (3764036003).

Almost surely, 2^25807990772 is an apocalyptic number.

It is an amenable number.

25807990772 is a deficient number, since it is larger than the sum of its proper divisors (19360441264).

25807990772 is a wasteful number, since it uses less digits than its factorization.

25807990772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635458 (or 635456 counting only the distinct ones).

The product of its (nonzero) digits is 4445280, while the sum is 56.

The spelling of 25807990772 in words is "twenty-five billion, eight hundred seven million, nine hundred ninety thousand, seven hundred seventy-two".