25498836720 has 320 divisors, whose sum is σ = 103616225280. Its totient is φ = 5640192000.

The previous prime is 25498836691. The next prime is 25498836739. The reversal of 25498836720 is 2763889452.

25498836720 is a `hidden beast` number, since 2 + 5 + 498 + 83 + 6 + 72 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 441520 + ... + 495920.

It is an arithmetic number, because the mean of its divisors is an integer number (323800704).

Almost surely, 2^25498836720 is an apocalyptic number.

25498836720 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 25498836720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51808112640).

25498836720 is an abundant number, since it is smaller than the sum of its proper divisors (78117388560).

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

25498836720 is a wasteful number, since it uses less digits than its factorization.

25498836720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54461 (or 54449 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 25498836720 in words is "twenty-five billion, four hundred ninety-eight million, eight hundred thirty-six thousand, seven hundred twenty".