7643899513 has 4 divisors (see below), whose sum is σ = 7647309648. Its totient is φ = 7640489380.

The previous prime is 7643899469. The next prime is 7643899517. The reversal of 7643899513 is 3159983467.

7643899513 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7643899513 - 2²⁵ = 7610345081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7643899517) 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 3 ways as a sum of consecutive naturals, for example, 1701703 + ... + 1706188.

It is an arithmetic number, because the mean of its divisors is an integer number (1911827412).

Almost surely, 2^7643899513 is an apocalyptic number.

It is an amenable number.

7643899513 is a deficient number, since it is larger than the sum of its proper divisors (3410135).

7643899513 is a wasteful number, since it uses less digits than its factorization.

7643899513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410134.

The product of its digits is 4898880, while the sum is 55.

The square root of 7643899513 is about 87429.3973043392. The cubic root of 7643899513 is about 1969.8734329948.

The spelling of 7643899513 in words is "seven billion, six hundred forty-three million, eight hundred ninety-nine thousand, five hundred thirteen".