25249238280 has 192 divisors, whose sum is σ = 96070665600. Its totient is φ = 5630469120.

The previous prime is 25249238251. The next prime is 25249238293. The reversal of 25249238280 is 8283294252.

25249238280 is a `hidden beast` number, since 2 + 5 + 2 + 492 + 3 + 82 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18870 + ... + 225509.

It is an arithmetic number, because the mean of its divisors is an integer number (500368050).

Almost surely, 2^25249238280 is an apocalyptic number.

25249238280 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 25249238280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48035332800).

25249238280 is an abundant number, since it is smaller than the sum of its proper divisors (70821427320).

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

25249238280 is a wasteful number, since it uses less digits than its factorization.

25249238280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244444 (or 244437 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 25249238280 in words is "twenty-five billion, two hundred forty-nine million, two hundred thirty-eight thousand, two hundred eighty".