25719718992 has 80 divisors (see below), whose sum is σ = 72535357440. Its totient is φ = 7788208000.

The previous prime is 25719718963. The next prime is 25719719059. The reversal of 25719718992 is 29981791752.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 742867 + ... + 776717.

It is an arithmetic number, because the mean of its divisors is an integer number (906691968).

Almost surely, 2^25719718992 is an apocalyptic number.

25719718992 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25719718992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36267678720).

25719718992 is an abundant number, since it is smaller than the sum of its proper divisors (46815638448).

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

25719718992 is a wasteful number, since it uses less digits than its factorization.

25719718992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35312 (or 35306 counting only the distinct ones).

The product of its digits is 5715360, while the sum is 60.

The spelling of 25719718992 in words is "twenty-five billion, seven hundred nineteen million, seven hundred eighteen thousand, nine hundred ninety-two".