25945993216 has 156 divisors (see below), whose sum is σ = 61433613976. Its totient is φ = 10883727360.

The previous prime is 25945993201. The next prime is 25945993217. The reversal of 25945993216 is 61239954952.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25945993217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6440995 + ... + 6445021.

Almost surely, 2^25945993216 is an apocalyptic number.

25945993216 is a gapful number since it is divisible by the number (26) 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 25945993216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30716806988).

25945993216 is an abundant number, since it is smaller than the sum of its proper divisors (35487620760).

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

25945993216 is a wasteful number, since it uses less digits than its factorization.

25945993216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4086 (or 4053 counting only the distinct ones).

The product of its digits is 5248800, while the sum is 55.

The spelling of 25945993216 in words is "twenty-five billion, nine hundred forty-five million, nine hundred ninety-three thousand, two hundred sixteen".