25297398418 has 8 divisors (see below), whose sum is σ = 39943260720. Its totient is φ = 11982978180.

The previous prime is 25297398409. The next prime is 25297398419. The reversal of 25297398418 is 81489379252.

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

It is not an unprimeable number, because it can be changed into a prime (25297398419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332860468 + ... + 332860543.

It is an arithmetic number, because the mean of its divisors is an integer number (4992907590).

Almost surely, 2^25297398418 is an apocalyptic number.

25297398418 is a deficient number, since it is larger than the sum of its proper divisors (14645862302).

25297398418 is a wasteful number, since it uses less digits than its factorization.

25297398418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665721032.

The product of its digits is 8709120, while the sum is 58.

The spelling of 25297398418 in words is "twenty-five billion, two hundred ninety-seven million, three hundred ninety-eight thousand, four hundred eighteen".