25240790520 has 192 divisors, whose sum is σ = 89561103840. Its totient is φ = 6114124800.

The previous prime is 25240790507. The next prime is 25240790563. The reversal of 25240790520 is 2509704252.

It is a happy number.

25240790520 is a `hidden beast` number, since 2 + 5 + 2 + 40 + 7 + 90 + 520 = 666.

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

It is a congruent number.

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, 9427422 + ... + 9430098.

Almost surely, 2^25240790520 is an apocalyptic number.

25240790520 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 25240790520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44780551920).

25240790520 is an abundant number, since it is smaller than the sum of its proper divisors (64320313320).

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

25240790520 is a wasteful number, since it uses less digits than its factorization.

25240790520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5086 (or 5079 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The spelling of 25240790520 in words is "twenty-five billion, two hundred forty million, seven hundred ninety thousand, five hundred twenty".