16719723674 has 4 divisors (see below), whose sum is σ = 25079585514. Its totient is φ = 8359861836.

The previous prime is 16719723667. The next prime is 16719723677. The reversal of 16719723674 is 47632791761.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47632791761 = 71 ⋅670884391.

It can be written as a sum of positive squares in only one way, i.e., 9595182025 + 7124541649 = 97955^2 + 84407^2 .

It is not an unprimeable number, because it can be changed into a prime (16719723677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4179930917 + ... + 4179930920.

Almost surely, 2^16719723674 is an apocalyptic number.

16719723674 is a deficient number, since it is larger than the sum of its proper divisors (8359861840).

16719723674 is an equidigital number, since it uses as much as digits as its factorization.

16719723674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8359861839.

The product of its digits is 2667168, while the sum is 53.

The spelling of 16719723674 in words is "sixteen billion, seven hundred nineteen million, seven hundred twenty-three thousand, six hundred seventy-four".