25280571420 has 240 divisors, whose sum is σ = 85924016640. Its totient is φ = 6222033792.

The previous prime is 25280571401. The next prime is 25280571427. The reversal of 25280571420 is 2417508252.

It is a happy number.

25280571420 is a `hidden beast` number, since 2 + 5 + 2 + 80 + 571 + 4 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25280571427) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3555589 + ... + 3562691.

It is an arithmetic number, because the mean of its divisors is an integer number (358016736).

Almost surely, 2^25280571420 is an apocalyptic number.

25280571420 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 25280571420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42962008320).

25280571420 is an abundant number, since it is smaller than the sum of its proper divisors (60643445220).

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

25280571420 is a wasteful number, since it uses less digits than its factorization.

25280571420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7163 (or 7126 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The spelling of 25280571420 in words is "twenty-five billion, two hundred eighty million, five hundred seventy-one thousand, four hundred twenty".