16691488737 has 16 divisors (see below), whose sum is σ = 27746890752. Its totient is φ = 8670903120.

The previous prime is 16691488687. The next prime is 16691488741. The reversal of 16691488737 is 73788419661.

It is not a de Polignac number, because 16691488737 - 2¹⁸ = 16691226593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16691488237) 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, 36128533 + ... + 36128994.

It is an arithmetic number, because the mean of its divisors is an integer number (1734180672).

Almost surely, 2^16691488737 is an apocalyptic number.

It is an amenable number.

16691488737 is a deficient number, since it is larger than the sum of its proper divisors (11055402015).

16691488737 is a wasteful number, since it uses less digits than its factorization.

16691488737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72257548.

The product of its digits is 12192768, while the sum is 60.

The spelling of 16691488737 in words is "sixteen billion, six hundred ninety-one million, four hundred eighty-eight thousand, seven hundred thirty-seven".