25875555840 has 960 divisors, whose sum is σ = 104394121920. Its totient is φ = 6051594240.

The previous prime is 25875555829. The next prime is 25875555883. The reversal of 25875555840 is 4855557852.

25875555840 is a `hidden beast` number, since 2 + 5 + 8 + 7 + 5 + 55 + 584 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 424189410 + ... + 424189470.

It is an arithmetic number, because the mean of its divisors is an integer number (108743877).

Almost surely, 2^25875555840 is an apocalyptic number.

25875555840 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 25875555840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52197060960).

25875555840 is an abundant number, since it is smaller than the sum of its proper divisors (78518566080).

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

25875555840 is a wasteful number, since it uses less digits than its factorization.

25875555840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 11200000, while the sum is 54.

The spelling of 25875555840 in words is "twenty-five billion, eight hundred seventy-five million, five hundred fifty-five thousand, eight hundred forty".