16001042065 has 8 divisors (see below), whose sum is σ = 19516025448. Its totient is φ = 12590983680.

The previous prime is 16001042053. The next prime is 16001042087. The reversal of 16001042065 is 56024010061.

It can be written as a sum of positive squares in 4 ways, for example, as 327754816 + 15673287249 = 18104^2 + 125193^2 .

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

It is not a de Polignac number, because 16001042065 - 2¹⁹ = 16000517777 is a prime.

It is a Duffinian number.

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, 26230912 + ... + 26231521.

It is an arithmetic number, because the mean of its divisors is an integer number (2439503181).

Almost surely, 2^16001042065 is an apocalyptic number.

It is an amenable number.

16001042065 is a deficient number, since it is larger than the sum of its proper divisors (3514983383).

16001042065 is an equidigital number, since it uses as much as digits as its factorization.

16001042065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52462499.

The product of its (nonzero) digits is 1440, while the sum is 25.

The spelling of 16001042065 in words is "sixteen billion, one million, forty-two thousand, sixty-five".