25106135808 has 144 divisors (see below), whose sum is σ = 72202059776. Its totient is φ = 7698862080.

The previous prime is 25106135779. The next prime is 25106135839. The reversal of 25106135808 is 80853160152.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3060993 + ... + 3069183.

Almost surely, 2^25106135808 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 25106135808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36101029888).

25106135808 is an abundant number, since it is smaller than the sum of its proper divisors (47095923968).

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

25106135808 is a wasteful number, since it uses less digits than its factorization.

25106135808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8530 (or 8516 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 39.

The spelling of 25106135808 in words is "twenty-five billion, one hundred six million, one hundred thirty-five thousand, eight hundred eight".