25965987996 has 48 divisors (see below), whose sum is σ = 67352649728. Its totient is φ = 7731806400.

The previous prime is 25965987979. The next prime is 25965987997. The reversal of 25965987996 is 69978956952.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25965987997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2679820 + ... + 2689491.

Almost surely, 2^25965987996 is an apocalyptic number.

25965987996 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

25965987996 is an abundant number, since it is smaller than the sum of its proper divisors (41386661732).

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

25965987996 is a wasteful number, since it uses less digits than its factorization.

25965987996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5369362 (or 5369360 counting only the distinct ones).

The product of its digits is 661348800, while the sum is 75.

The spelling of 25965987996 in words is "twenty-five billion, nine hundred sixty-five million, nine hundred eighty-seven thousand, nine hundred ninety-six".