25645506 has 32 divisors (see below), whose sum is σ = 54190080. Its totient is φ = 8074704.

The previous prime is 25645493. The next prime is 25645507. The reversal of 25645506 is 60554652.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25645507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10335 + ... + 12573.

It is an arithmetic number, because the mean of its divisors is an integer number (1693440).

Almost surely, 2^25645506 is an apocalyptic number.

25645506 is an abundant number, since it is smaller than the sum of its proper divisors (28544574).

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

25645506 is a wasteful number, since it uses less digits than its factorization.

25645506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2350.

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 25645506 is about 5064.1392160959. The cubic root of 25645506 is about 294.8970472881.

The spelling of 25645506 in words is "twenty-five million, six hundred forty-five thousand, five hundred six".