25871850420 has 384 divisors, whose sum is σ = 83452723200. Its totient is φ = 5943490560.

The previous prime is 25871850409. The next prime is 25871850421. The reversal of 25871850420 is 2405817852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25871850421) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 154921177 + ... + 154921343.

It is an arithmetic number, because the mean of its divisors is an integer number (217324800).

Almost surely, 2^25871850420 is an apocalyptic number.

25871850420 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 25871850420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41726361600).

25871850420 is an abundant number, since it is smaller than the sum of its proper divisors (57580872780).

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

25871850420 is a wasteful number, since it uses less digits than its factorization.

25871850420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 42.

The spelling of 25871850420 in words is "twenty-five billion, eight hundred seventy-one million, eight hundred fifty thousand, four hundred twenty".