25915654368 has 144 divisors (see below), whose sum is σ = 74414667600. Its totient is φ = 8554936320.

The previous prime is 25915654351. The next prime is 25915654379. The reversal of 25915654368 is 86345651952.

25915654368 is a `hidden beast` number, since 2 + 5 + 91 + 5 + 6 + 543 + 6 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×25915654368² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14485218 + ... + 14487006.

It is an arithmetic number, because the mean of its divisors is an integer number (516768525).

Almost surely, 2^25915654368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25915654368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37207333800).

25915654368 is an abundant number, since it is smaller than the sum of its proper divisors (48499013232).

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

25915654368 is a wasteful number, since it uses less digits than its factorization.

25915654368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2265 (or 2254 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 54.

The spelling of 25915654368 in words is "twenty-five billion, nine hundred fifteen million, six hundred fifty-four thousand, three hundred sixty-eight".