7664315638 has 8 divisors (see below), whose sum is σ = 13138826832. Its totient is φ = 3284706696.

The previous prime is 7664315621. The next prime is 7664315641. The reversal of 7664315638 is 8365134667.

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

It is a junction number, because it is equal to n+sod(n) for n = 7664315591 and 7664315600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273725545 + ... + 273725572.

It is an arithmetic number, because the mean of its divisors is an integer number (1642353354).

Almost surely, 2^7664315638 is an apocalyptic number.

7664315638 is a deficient number, since it is larger than the sum of its proper divisors (5474511194).

7664315638 is a wasteful number, since it uses less digits than its factorization.

7664315638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547451126.

The product of its digits is 2177280, while the sum is 49.

The square root of 7664315638 is about 87546.0772279375. The cubic root of 7664315638 is about 1971.6256551336.

The spelling of 7664315638 in words is "seven billion, six hundred sixty-four million, three hundred fifteen thousand, six hundred thirty-eight".