25991417002 has 8 divisors (see below), whose sum is σ = 39050727876. Its totient is φ = 12974507712.

The previous prime is 25991416987. The next prime is 25991417051. The reversal of 25991417002 is 20071419952.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25988986521 + 2430481 = 161211^2 + 1559^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10598863 + ... + 10601314.

Almost surely, 2^25991417002 is an apocalyptic number.

25991417002 is a deficient number, since it is larger than the sum of its proper divisors (13059310874).

25991417002 is a wasteful number, since it uses less digits than its factorization.

25991417002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21200792.

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 25991417002 in words is "twenty-five billion, nine hundred ninety-one million, four hundred seventeen thousand, two".