7628847664 has 20 divisors (see below), whose sum is σ = 15180377104. Its totient is φ = 3711331008.

The previous prime is 7628847649. The next prime is 7628847671. The reversal of 7628847664 is 4667488267.

It is a junction number, because it is equal to n+sod(n) for n = 7628847599 and 7628847608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6442692 + ... + 6443875.

Almost surely, 2^7628847664 is an apocalyptic number.

7628847664 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

7628847664 is a deficient number, since it is larger than the sum of its proper divisors (7551529440).

7628847664 is a wasteful number, since it uses less digits than its factorization.

7628847664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12886612 (or 12886606 counting only the distinct ones).

The product of its digits is 21676032, while the sum is 58.

The square root of 7628847664 is about 87343.2748641817. The cubic root of 7628847664 is about 1968.5796029509.

The spelling of 7628847664 in words is "seven billion, six hundred twenty-eight million, eight hundred forty-seven thousand, six hundred sixty-four".