6619134509 has 4 divisors (see below), whose sum is σ = 7128298716. Its totient is φ = 6109970304.

The previous prime is 6619134491. The next prime is 6619134517. The reversal of 6619134509 is 9054319166.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1902878884 + 4716255625 = 43622^2 + 68675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6619134509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6619134509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6619164509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254582084 + ... + 254582109.

It is an arithmetic number, because the mean of its divisors is an integer number (1782074679).

Almost surely, 2^6619134509 is an apocalyptic number.

It is an amenable number.

6619134509 is a deficient number, since it is larger than the sum of its proper divisors (509164207).

6619134509 is a wasteful number, since it uses less digits than its factorization.

6619134509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509164206.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 6619134509 is about 81358.0635770051. The cubic root of 6619134509 is about 1877.5884377223.

The spelling of 6619134509 in words is "six billion, six hundred nineteen million, one hundred thirty-four thousand, five hundred nine".