25985449705508 has 12 divisors (see below), whose sum is σ = 45535740942720. Its totient is φ = 12975238007592.

The previous prime is 25985449705381. The next prime is 25985449705531. The reversal of 25985449705508 is 80550794458952.

It is a super-3 number, since 3×25985449705508³ (a number of 41 digits) contains 333 as substring.

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, 4371707948 + ... + 4371713891.

It is an arithmetic number, because the mean of its divisors is an integer number (3794645078560).

Almost surely, 2^{25985449705508} is an apocalyptic number.

It is an amenable number.

25985449705508 is a deficient number, since it is larger than the sum of its proper divisors (19550291237212).

25985449705508 is a wasteful number, since it uses less digits than its factorization.

25985449705508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8743422586 (or 8743422584 counting only the distinct ones).

The product of its (nonzero) digits is 725760000, while the sum is 71.

The spelling of 25985449705508 in words is "twenty-five trillion, nine hundred eighty-five billion, four hundred forty-nine million, seven hundred five thousand, five hundred eight".