16681996734 has 16 divisors (see below), whose sum is σ = 35930454672. Its totient is φ = 5132922048.

The previous prime is 16681996733. The next prime is 16681996757. The reversal of 16681996734 is 43769918661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16681996733) 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, 106935799 + ... + 106935954.

It is an arithmetic number, because the mean of its divisors is an integer number (2245653417).

Almost surely, 2^16681996734 is an apocalyptic number.

16681996734 is an abundant number, since it is smaller than the sum of its proper divisors (19248457938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16681996734 is a wasteful number, since it uses less digits than its factorization.

16681996734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213871771.

The product of its digits is 11757312, while the sum is 60.

The spelling of 16681996734 in words is "sixteen billion, six hundred eighty-one million, nine hundred ninety-six thousand, seven hundred thirty-four".