6501916165 has 4 divisors (see below), whose sum is σ = 7802299404. Its totient is φ = 5201532928.

The previous prime is 6501916159. The next prime is 6501916181. The reversal of 6501916165 is 5616191056.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4079504641 + 2422411524 = 63871^2 + 49218^2 .

It is a cyclic number.

It is not a de Polignac number, because 6501916165 - 2¹¹ = 6501914117 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 650191612 + ... + 650191621.

It is an arithmetic number, because the mean of its divisors is an integer number (1950574851).

Almost surely, 2^6501916165 is an apocalyptic number.

It is an amenable number.

6501916165 is a deficient number, since it is larger than the sum of its proper divisors (1300383239).

6501916165 is a wasteful number, since it uses less digits than its factorization.

6501916165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300383238.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 6501916165 is about 80634.4601581731. The cubic root of 6501916165 is about 1866.4389477562.

The spelling of 6501916165 in words is "six billion, five hundred one million, nine hundred sixteen thousand, one hundred sixty-five".