25945993220 has 96 divisors (see below), whose sum is σ = 64077280512. Its totient is φ = 8638576128.

The previous prime is 25945993219. The next prime is 25945993231. The reversal of 25945993220 is 2239954952.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2828882 + ... + 2838038.

It is an arithmetic number, because the mean of its divisors is an integer number (667471672).

Almost surely, 2^25945993220 is an apocalyptic number.

25945993220 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 25945993220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32038640256).

25945993220 is an abundant number, since it is smaller than the sum of its proper divisors (38131287292).

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

25945993220 is a wasteful number, since it uses less digits than its factorization.

25945993220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9757 (or 9755 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 50.

The spelling of 25945993220 in words is "twenty-five billion, nine hundred forty-five million, nine hundred ninety-three thousand, two hundred twenty".