25944990720 has 176 divisors, whose sum is σ = 90527969088. Its totient is φ = 6289653760.

The previous prime is 25944990719. The next prime is 25944990733. The reversal of 25944990720 is 2709944952.

It is a tau number, because it is divible by the number of its divisors (176).

It is a super-2 number, since 2×25944990720² (a number of 22 digits) contains 22 as substring.

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, 92182 + ... + 245738.

Almost surely, 2^25944990720 is an apocalyptic number.

25944990720 is a gapful number since it is divisible by the number (20) 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 25944990720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45263984544).

25944990720 is an abundant number, since it is smaller than the sum of its proper divisors (64582978368).

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

25944990720 is a wasteful number, since it uses less digits than its factorization.

25944990720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153596 (or 153578 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 51.

The spelling of 25944990720 in words is "twenty-five billion, nine hundred forty-four million, nine hundred ninety thousand, seven hundred twenty".