25891756032 has 96 divisors (see below), whose sum is σ = 69276392640. Its totient is φ = 8599511040.

The previous prime is 25891756031. The next prime is 25891756039. The reversal of 25891756032 is 23065719852.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25891756031) 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 7 ways as a sum of consecutive naturals, for example, 1731307 + ... + 1746197.

It is an arithmetic number, because the mean of its divisors is an integer number (721629090).

Almost surely, 2^25891756032 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 25891756032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34638196320).

25891756032 is an abundant number, since it is smaller than the sum of its proper divisors (43384636608).

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

25891756032 is a wasteful number, since it uses less digits than its factorization.

25891756032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15199 (or 15179 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 48.

The spelling of 25891756032 in words is "twenty-five billion, eight hundred ninety-one million, seven hundred fifty-six thousand, thirty-two".