25464646 has 4 divisors (see below), whose sum is σ = 38196972. Its totient is φ = 12732322.

The previous prime is 25464641. The next prime is 25464653. The reversal of 25464646 is 64646452.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25464641) 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 as a sum of consecutive naturals, namely, 6366160 + ... + 6366163.

It is an arithmetic number, because the mean of its divisors is an integer number (9549243).

Almost surely, 2^25464646 is an apocalyptic number.

25464646 is a deficient number, since it is larger than the sum of its proper divisors (12732326).

25464646 is a wasteful number, since it uses less digits than its factorization.

25464646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12732325.

The product of its digits is 138240, while the sum is 37.

The square root of 25464646 is about 5046.2506873916. The cubic root of 25464646 is about 294.2021763299.

The spelling of 25464646 in words is "twenty-five million, four hundred sixty-four thousand, six hundred forty-six".