7664838128 has 10 divisors (see below), whose sum is σ = 14850623904. Its totient is φ = 3832419056.

The previous prime is 7664838121. The next prime is 7664838131. The reversal of 7664838128 is 8218384667.

It is a self number, because there is not a number n which added to its sum of digits gives 7664838128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7664838121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239526176 + ... + 239526207.

Almost surely, 2^7664838128 is an apocalyptic number.

It is an amenable number.

7664838128 is a deficient number, since it is larger than the sum of its proper divisors (7185785776).

7664838128 is a wasteful number, since it uses less digits than its factorization.

7664838128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479052391 (or 479052385 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 53.

The square root of 7664838128 is about 87549.0612628142. The cubic root of 7664838128 is about 1971.6704571890.

The spelling of 7664838128 in words is "seven billion, six hundred sixty-four million, eight hundred thirty-eight thousand, one hundred twenty-eight".