25991085936 has 80 divisors (see below), whose sum is σ = 72258866208. Its totient is φ = 8020377600.

The previous prime is 25991085931. The next prime is 25991085977. The reversal of 25991085936 is 63958019952.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25991085931) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 211305 + ... + 310856.

Almost surely, 2^25991085936 is an apocalyptic number.

It is an amenable number.

25991085936 is an abundant number, since it is smaller than the sum of its proper divisors (46267780272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25991085936 is a wasteful number, since it uses less digits than its factorization.

25991085936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522250 (or 522244 counting only the distinct ones).

The product of its (nonzero) digits is 5248800, while the sum is 57.

The spelling of 25991085936 in words is "twenty-five billion, nine hundred ninety-one million, eighty-five thousand, nine hundred thirty-six".