25899846240 has 96 divisors (see below), whose sum is σ = 81850728960. Its totient is φ = 6884089344.

The previous prime is 25899846211. The next prime is 25899846281. The reversal of 25899846240 is 4264899852.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

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, 59481 + ... + 235239.

It is an arithmetic number, because the mean of its divisors is an integer number (852611760).

Almost surely, 2^25899846240 is an apocalyptic number.

25899846240 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 25899846240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40925364480).

25899846240 is an abundant number, since it is smaller than the sum of its proper divisors (55950882720).

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

25899846240 is a wasteful number, since it uses less digits than its factorization.

25899846240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176084 (or 176076 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 57.

The spelling of 25899846240 in words is "twenty-five billion, eight hundred ninety-nine million, eight hundred forty-six thousand, two hundred forty".