25536498 has 64 divisors (see below), whose sum is σ = 58060800. Its totient is φ = 7433280.

The previous prime is 25536479. The next prime is 25536517. The reversal of 25536498 is 89463552.

It is an interprime number because it is at equal distance from previous prime (25536479) and next prime (25536517).

It is a super-2 number, since 2×25536498² = 1304225460208008, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 142573 + ... + 142751.

It is an arithmetic number, because the mean of its divisors is an integer number (907200).

Almost surely, 2^25536498 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25536498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29030400).

25536498 is an abundant number, since it is smaller than the sum of its proper divisors (32524302).

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

25536498 is a wasteful number, since it uses less digits than its factorization.

25536498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287.

The product of its digits is 259200, while the sum is 42.

The square root of 25536498 is about 5053.3650174908. The cubic root of 25536498 is about 294.4786271089.

The spelling of 25536498 in words is "twenty-five million, five hundred thirty-six thousand, four hundred ninety-eight".