16724179684 has 9 divisors (see below), whose sum is σ = 29267767081. Its totient is φ = 8361960520.

The previous prime is 16724179657. The next prime is 16724179687. The reversal of 16724179684 is 48697142761.

The square root of 16724179684 is 129322.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 227346084 + 16496833600 = 15078^2 + 128440^2 .

It is a super-2 number, since 2×16724179684² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16724179687) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 226314 + ... + 290974.

Almost surely, 2^16724179684 is an apocalyptic number.

16724179684 is the 129322-nd square number.

It is an amenable number.

16724179684 is a deficient number, since it is larger than the sum of its proper divisors (12543587397).

16724179684 is an frugal number, since it uses more digits than its factorization.

16724179684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129326 (or 64663 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 55.

The spelling of 16724179684 in words is "sixteen billion, seven hundred twenty-four million, one hundred seventy-nine thousand, six hundred eighty-four".