17338978909 has 16 divisors (see below), whose sum is σ = 20086070400. Its totient is φ = 14660616384.

The previous prime is 17338978889. The next prime is 17338978919. The reversal of 17338978909 is 90987983371.

It is a cyclic number.

It is not a de Polignac number, because 17338978909 - 2⁷ = 17338978781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17338978919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123147 + ... + 223255.

It is an arithmetic number, because the mean of its divisors is an integer number (1255379400).

Almost surely, 2^17338978909 is an apocalyptic number.

It is an amenable number.

17338978909 is a deficient number, since it is larger than the sum of its proper divisors (2747091491).

17338978909 is a wasteful number, since it uses less digits than its factorization.

17338978909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100452.

The product of its (nonzero) digits is 20575296, while the sum is 64.

The spelling of 17338978909 in words is "seventeen billion, three hundred thirty-eight million, nine hundred seventy-eight thousand, nine hundred nine".