16447739686 has 16 divisors (see below), whose sum is σ = 28261253664. Its totient is φ = 7032749184.

The previous prime is 16447739677. The next prime is 16447739687. The reversal of 16447739686 is 68693774461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16447739687) 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, 1350565 + ... + 1362688.

It is an arithmetic number, because the mean of its divisors is an integer number (1766328354).

Almost surely, 2^16447739686 is an apocalyptic number.

16447739686 is a deficient number, since it is larger than the sum of its proper divisors (11813513978).

16447739686 is a wasteful number, since it uses less digits than its factorization.

16447739686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2713695.

The product of its digits is 36578304, while the sum is 61.

The spelling of 16447739686 in words is "sixteen billion, four hundred forty-seven million, seven hundred thirty-nine thousand, six hundred eighty-six".