25254918864 has 180 divisors, whose sum is σ = 85251986976. Its totient is φ = 6835819392.

The previous prime is 25254918851. The next prime is 25254918877. The reversal of 25254918864 is 46881945252.

25254918864 is a `hidden beast` number, since 2 + 5 + 2 + 549 + 18 + 86 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (25254918851) and next prime (25254918877).

It is a self number, because there is not a number n which added to its sum of digits gives 25254918864.

It is a congruent number.

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 35 ways as a sum of consecutive naturals, for example, 329187 + ... + 398589.

Almost surely, 2^25254918864 is an apocalyptic number.

25254918864 is a gapful number since it is divisible by the number (24) 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 25254918864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42625993488).

25254918864 is an abundant number, since it is smaller than the sum of its proper divisors (59997068112).

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

25254918864 is a wasteful number, since it uses less digits than its factorization.

25254918864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69462 (or 69434 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 54.

The spelling of 25254918864 in words is "twenty-five billion, two hundred fifty-four million, nine hundred eighteen thousand, eight hundred sixty-four".