25580064 has 96 divisors (see below), whose sum is σ = 70531776. Its totient is φ = 8110080.

The previous prime is 25580063. The next prime is 25580077. The reversal of 25580064 is 46008552.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (25580063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263664 + ... + 263760.

It is an arithmetic number, because the mean of its divisors is an integer number (734706).

Almost surely, 2^25580064 is an apocalyptic number.

25580064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25580064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35265888).

25580064 is an abundant number, since it is smaller than the sum of its proper divisors (44951712).

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

25580064 is a wasteful number, since it uses less digits than its factorization.

25580064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 25580064 is about 5057.6737735841. The cubic root of 25580064 is about 294.6459949691.

The spelling of 25580064 in words is "twenty-five million, five hundred eighty thousand, sixty-four".