16691226539 has 8 divisors (see below), whose sum is σ = 17992123632. Its totient is φ = 15392751840.

The previous prime is 16691226511. The next prime is 16691226551. The reversal of 16691226539 is 93562219661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16691226539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16691226439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 591269 + ... + 618854.

It is an arithmetic number, because the mean of its divisors is an integer number (2249015454).

Almost surely, 2^16691226539 is an apocalyptic number.

16691226539 is a deficient number, since it is larger than the sum of its proper divisors (1300897093).

16691226539 is a wasteful number, since it uses less digits than its factorization.

16691226539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211197.

The product of its digits is 1049760, while the sum is 50.

The spelling of 16691226539 in words is "sixteen billion, six hundred ninety-one million, two hundred twenty-six thousand, five hundred thirty-nine".