25880043840 has 336 divisors, whose sum is σ = 101210254272. Its totient is φ = 5567299584.

The previous prime is 25880043803. The next prime is 25880043841. The reversal of 25880043840 is 4834008852.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (336).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 25880043792 and 25880043801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25880043841) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 783499 + ... + 815861.

Almost surely, 2^25880043840 is an apocalyptic number.

25880043840 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 25880043840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50605127136).

25880043840 is an abundant number, since it is smaller than the sum of its proper divisors (75330210432).

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

25880043840 is a wasteful number, since it uses less digits than its factorization.

25880043840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32414 (or 32397 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 42.

The spelling of 25880043840 in words is "twenty-five billion, eight hundred eighty million, forty-three thousand, eight hundred forty".