25943901984 has 576 divisors, whose sum is σ = 102289195008. Its totient is φ = 6017587200.

The previous prime is 25943901983. The next prime is 25943902057. The reversal of 25943901984 is 48910934952.

25943901984 is a `hidden beast` number, since 2 + 594 + 39 + 0 + 19 + 8 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 25943901984.

It is not an unprimeable number, because it can be changed into a prime (25943901983) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 8935477 + ... + 8938379.

It is an arithmetic number, because the mean of its divisors is an integer number (177585408).

Almost surely, 2^25943901984 is an apocalyptic number.

25943901984 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 25943901984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51144597504).

25943901984 is an abundant number, since it is smaller than the sum of its proper divisors (76345293024).

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

25943901984 is a wasteful number, since it uses less digits than its factorization.

25943901984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2981 (or 2970 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 25943901984 in words is "twenty-five billion, nine hundred forty-three million, nine hundred one thousand, nine hundred eighty-four".