16391709074 has 8 divisors (see below), whose sum is σ = 26478914700. Its totient is φ = 7565404176.

The previous prime is 16391709071. The next prime is 16391709083. The reversal of 16391709074 is 47090719361.

It can be written as a sum of positive squares in 2 ways, for example, as 15324706849 + 1067002225 = 123793^2 + 32665^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16391709071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315225149 + ... + 315225200.

Almost surely, 2^16391709074 is an apocalyptic number.

16391709074 is a deficient number, since it is larger than the sum of its proper divisors (10087205626).

16391709074 is a wasteful number, since it uses less digits than its factorization.

16391709074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630450364.

The product of its (nonzero) digits is 285768, while the sum is 47.

The spelling of 16391709074 in words is "sixteen billion, three hundred ninety-one million, seven hundred nine thousand, seventy-four".