25215418368 has 480 divisors, whose sum is σ = 90594201600. Its totient is φ = 6766460928.

The previous prime is 25215418367. The next prime is 25215418373. The reversal of 25215418368 is 86381451252.

25215418368 is a `hidden beast` number, since 2 + 5 + 21 + 541 + 83 + 6 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (25215418363) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52641553 + ... + 52642031.

It is an arithmetic number, because the mean of its divisors is an integer number (188737920).

Almost surely, 2^25215418368 is an apocalyptic number.

25215418368 is a gapful number since it is divisible by the number (28) 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 25215418368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45297100800).

25215418368 is an abundant number, since it is smaller than the sum of its proper divisors (65378783232).

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

25215418368 is an equidigital number, since it uses as much as digits as its factorization.

25215418368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 508 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The spelling of 25215418368 in words is "twenty-five billion, two hundred fifteen million, four hundred eighteen thousand, three hundred sixty-eight".