25732491843240 has 3456 divisors, whose sum is σ = 117656576593920. Its totient is φ = 4825200844800.

The previous prime is 25732491843217. The next prime is 25732491843257. The reversal of 25732491843240 is 4234819423752.

25732491843240 is a `hidden beast` number, since 2 + 5 + 7 + 3 + 2 + 491 + 84 + 32 + 40 = 666.

It is a super-2 number, since 2×25732491843240² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 863 ways as a sum of consecutive naturals, for example, 94953844305 + ... + 94953844575.

It is an arithmetic number, because the mean of its divisors is an integer number (34044148320).

Almost surely, 2^{25732491843240} is an apocalyptic number.

25732491843240 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 25732491843240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58828288296960).

25732491843240 is an abundant number, since it is smaller than the sum of its proper divisors (91924084750680).

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

25732491843240 is a wasteful number, since it uses less digits than its factorization.

25732491843240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 388 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 54.

The spelling of 25732491843240 in words is "twenty-five trillion, seven hundred thirty-two billion, four hundred ninety-one million, eight hundred forty-three thousand, two hundred forty".