25921458976 has 96 divisors (see below), whose sum is σ = 60471290880. Its totient is φ = 10703232000.

The previous prime is 25921458971. The next prime is 25921458989. The reversal of 25921458976 is 67985412952.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 25921458976.

It is not an unprimeable number, because it can be changed into a prime (25921458971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1582026 + ... + 1598326.

It is an arithmetic number, because the mean of its divisors is an integer number (629909280).

Almost surely, 2^25921458976 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 25921458976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30235645440).

25921458976 is an abundant number, since it is smaller than the sum of its proper divisors (34549831904).

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

25921458976 is a wasteful number, since it uses less digits than its factorization.

25921458976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16578 (or 16570 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 58.

The spelling of 25921458976 in words is "twenty-five billion, nine hundred twenty-one million, four hundred fifty-eight thousand, nine hundred seventy-six".