16312602665 has 12 divisors (see below), whose sum is σ = 20659619844. Its totient is φ = 12363234336.

The previous prime is 16312602599. The next prime is 16312602707. The reversal of 16312602665 is 56620621361.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9437539609 + 6875063056 = 97147^2 + 82916^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16312602665 is a prime.

It is a super-2 number, since 2×16312602665² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4516922 + ... + 4520531.

It is an arithmetic number, because the mean of its divisors is an integer number (1721634987).

Almost surely, 2^16312602665 is an apocalyptic number.

It is an amenable number.

16312602665 is a deficient number, since it is larger than the sum of its proper divisors (4347017179).

16312602665 is an equidigital number, since it uses as much as digits as its factorization.

16312602665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9037496 (or 9037477 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 16312602665 in words is "sixteen billion, three hundred twelve million, six hundred two thousand, six hundred sixty-five".