7643608509 has 8 divisors (see below), whose sum is σ = 10199198272. Its totient is φ = 5091878880.

The previous prime is 7643608501. The next prime is 7643608513. The reversal of 7643608509 is 9058063467.

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

It is not a de Polignac number, because 7643608509 - 2³ = 7643608501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7643608501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 960409 + ... + 968334.

It is an arithmetic number, because the mean of its divisors is an integer number (1274899784).

Almost surely, 2^7643608509 is an apocalyptic number.

It is an amenable number.

7643608509 is a deficient number, since it is larger than the sum of its proper divisors (2555589763).

7643608509 is a wasteful number, since it uses less digits than its factorization.

7643608509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1930067.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 7643608509 is about 87427.7330656583. The cubic root of 7643608509 is about 1969.8484349197.

The spelling of 7643608509 in words is "seven billion, six hundred forty-three million, six hundred eight thousand, five hundred nine".