25545630 has 64 divisors (see below), whose sum is σ = 67392000. Its totient is φ = 6145920.

The previous prime is 25545613. The next prime is 25545647. The reversal of 25545630 is 3654552.

It is an interprime number because it is at equal distance from previous prime (25545613) and next prime (25545647).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent 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, 65476 + ... + 65864.

It is an arithmetic number, because the mean of its divisors is an integer number (1053000).

Almost surely, 2^25545630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25545630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33696000).

25545630 is an abundant number, since it is smaller than the sum of its proper divisors (41846370).

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

25545630 is a wasteful number, since it uses less digits than its factorization.

25545630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609.

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 25545630 is about 5054.2684930660. The cubic root of 25545630 is about 294.5137253479.

The spelling of 25545630 in words is "twenty-five million, five hundred forty-five thousand, six hundred thirty".