6128607665 has 8 divisors (see below), whose sum is σ = 7553095080. Its totient is φ = 4770375552.

The previous prime is 6128607647. The next prime is 6128607673. The reversal of 6128607665 is 5667068216.

It can be written as a sum of positive squares in 4 ways, for example, as 1880696689 + 4247910976 = 43367^2 + 65176^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6128607665 - 2⁶ = 6128607601 is a prime.

It is a super-2 number, since 2×6128607665² = 75119663822993504450, which contains 22 as substring.

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, 16563620 + ... + 16563989.

It is an arithmetic number, because the mean of its divisors is an integer number (944136885).

Almost surely, 2^6128607665 is an apocalyptic number.

It is an amenable number.

6128607665 is a deficient number, since it is larger than the sum of its proper divisors (1424487415).

6128607665 is a wasteful number, since it uses less digits than its factorization.

6128607665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33127651.

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 6128607665 is about 78285.4243457874. The cubic root of 6128607665 is about 1830.0120103326.

The spelling of 6128607665 in words is "six billion, one hundred twenty-eight million, six hundred seven thousand, six hundred sixty-five".