25708493408 has 48 divisors (see below), whose sum is σ = 54647414640. Its totient is φ = 11834881536.

The previous prime is 25708493407. The next prime is 25708493429. The reversal of 25708493408 is 80439480752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25708493401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82391 + ... + 241257.

It is an arithmetic number, because the mean of its divisors is an integer number (1138487805).

Almost surely, 2^25708493408 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 25708493408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27323707320).

25708493408 is an abundant number, since it is smaller than the sum of its proper divisors (28938921232).

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

25708493408 is a wasteful number, since it uses less digits than its factorization.

25708493408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159279 (or 159271 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 25708493408 in words is "twenty-five billion, seven hundred eight million, four hundred ninety-three thousand, four hundred eight".