25896639384 has 256 divisors, whose sum is σ = 92580249600. Its totient is φ = 6509289600.

The previous prime is 25896639317. The next prime is 25896639409. The reversal of 25896639384 is 48393669852.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 490479 + ... + 540705.

It is an arithmetic number, because the mean of its divisors is an integer number (361641600).

Almost surely, 2^25896639384 is an apocalyptic number.

25896639384 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 25896639384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46290124800).

25896639384 is an abundant number, since it is smaller than the sum of its proper divisors (66683610216).

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

25896639384 is a wasteful number, since it uses less digits than its factorization.

25896639384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50291 (or 50281 counting only the distinct ones).

The product of its digits is 67184640, while the sum is 63.

The spelling of 25896639384 in words is "twenty-five billion, eight hundred ninety-six million, six hundred thirty-nine thousand, three hundred eighty-four".