7638165215 has 8 divisors (see below), whose sum is σ = 9169245888. Its totient is φ = 6108233760.

The previous prime is 7638165179. The next prime is 7638165217. The reversal of 7638165215 is 5125618367.

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

It is a de Polignac number, because none of the positive numbers 2^k-7638165215 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 (7638165217) 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, 272612 + ... + 299321.

It is an arithmetic number, because the mean of its divisors is an integer number (1146155736).

Almost surely, 2^7638165215 is an apocalyptic number.

7638165215 is a deficient number, since it is larger than the sum of its proper divisors (1531080673).

7638165215 is a wasteful number, since it uses less digits than its factorization.

7638165215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574609.

The product of its digits is 302400, while the sum is 44.

The square root of 7638165215 is about 87396.5972735781. The cubic root of 7638165215 is about 1969.3807234346.

The spelling of 7638165215 in words is "seven billion, six hundred thirty-eight million, one hundred sixty-five thousand, two hundred fifteen".