25851317996 has 48 divisors (see below), whose sum is σ = 54531321600. Its totient is φ = 10475293248.

The previous prime is 25851317993. The next prime is 25851318007. The reversal of 25851317996 is 69971315852.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25851317993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223055 + ... + 318521.

It is an arithmetic number, because the mean of its divisors is an integer number (1136069200).

Almost surely, 2^25851317996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25851317996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27265660800).

25851317996 is an abundant number, since it is smaller than the sum of its proper divisors (28680003604).

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

25851317996 is a wasteful number, since it uses less digits than its factorization.

25851317996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96006 (or 96004 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 56.

The spelling of 25851317996 in words is "twenty-five billion, eight hundred fifty-one million, three hundred seventeen thousand, nine hundred ninety-six".