25521116398 has 8 divisors (see below), whose sum is σ = 38285949960. Its totient is φ = 12759133080.

The previous prime is 25521116381. The next prime is 25521116417. The reversal of 25521116398 is 89361112552.

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

It is a congruent number.

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, 690033 + ... + 726076.

It is an arithmetic number, because the mean of its divisors is an integer number (4785743745).

Almost surely, 2^25521116398 is an apocalyptic number.

25521116398 is a deficient number, since it is larger than the sum of its proper divisors (12764833562).

25521116398 is a wasteful number, since it uses less digits than its factorization.

25521116398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425122.

The product of its digits is 129600, while the sum is 43.

The spelling of 25521116398 in words is "twenty-five billion, five hundred twenty-one million, one hundred sixteen thousand, three hundred ninety-eight".