25585938990 has 112 divisors (see below), whose sum is σ = 72053113248. Its totient is φ = 6526225728.

The previous prime is 25585938943. The next prime is 25585939019. The reversal of 25585938990 is 9983958552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 91372 + ... + 243968.

Almost surely, 2^25585938990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25585938990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36026556624).

25585938990 is an abundant number, since it is smaller than the sum of its proper divisors (46467174258).

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

25585938990 is a wasteful number, since it uses less digits than its factorization.

25585938990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152645 (or 152630 counting only the distinct ones).

The product of its (nonzero) digits is 34992000, while the sum is 63.

It can be divided in two parts, 255859 and 38990, that added together give a square (294849 = 543²).

The spelling of 25585938990 in words is "twenty-five billion, five hundred eighty-five million, nine hundred thirty-eight thousand, nine hundred ninety".