7664318645 has 8 divisors (see below), whose sum is σ = 9202908120. Its totient is φ = 6127637760.

The previous prime is 7664318617. The next prime is 7664318663. The reversal of 7664318645 is 5468134667.

It can be written as a sum of positive squares in 4 ways, for example, as 631315876 + 7033002769 = 25126^2 + 83863^2 .

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-7664318645 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7664318593 and 7664318602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 468296 + ... + 484385.

It is an arithmetic number, because the mean of its divisors is an integer number (1150363515).

Almost surely, 2^7664318645 is an apocalyptic number.

It is an amenable number.

7664318645 is a deficient number, since it is larger than the sum of its proper divisors (1538589475).

7664318645 is a wasteful number, since it uses less digits than its factorization.

7664318645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954295.

The product of its digits is 2903040, while the sum is 50.

The square root of 7664318645 is about 87546.0944017493. The cubic root of 7664318645 is about 1971.6259129813.

The spelling of 7664318645 in words is "seven billion, six hundred sixty-four million, three hundred eighteen thousand, six hundred forty-five".