7644561 has 8 divisors (see below), whose sum is σ = 10385280. Its totient is φ = 5000112.

The previous prime is 7644551. The next prime is 7644587. The reversal of 7644561 is 1654467.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7644561 - 2⁵ = 7644529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7644521) 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 7 ways as a sum of consecutive naturals, for example, 23881 + ... + 24198.

It is an arithmetic number, because the mean of its divisors is an integer number (1298160).

Almost surely, 2^7644561 is an apocalyptic number.

It is an amenable number.

7644561 is a deficient number, since it is larger than the sum of its proper divisors (2740719).

7644561 is a wasteful number, since it uses less digits than its factorization.

7644561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48135.

The product of its digits is 20160, while the sum is 33.

The square root of 7644561 is about 2764.8799250600. The cubic root of 7644561 is about 196.9930254258.

The spelling of 7644561 in words is "seven million, six hundred forty-four thousand, five hundred sixty-one".