16715642644 has 6 divisors (see below), whose sum is σ = 29252374634. Its totient is φ = 8357821320.

The previous prime is 16715642621. The next prime is 16715642651. The reversal of 16715642644 is 44624651761.

It is a happy number.

16715642644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8725428100 + 7990214544 = 93410^2 + 89388^2 .

It is a super-2 number, since 2×16715642644² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16715642594 and 16715642603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2089455327 + ... + 2089455334.

Almost surely, 2^16715642644 is an apocalyptic number.

It is an amenable number.

16715642644 is a deficient number, since it is larger than the sum of its proper divisors (12536731990).

16715642644 is a wasteful number, since it uses less digits than its factorization.

16715642644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4178910665 (or 4178910663 counting only the distinct ones).

The product of its digits is 967680, while the sum is 46.

The spelling of 16715642644 in words is "sixteen billion, seven hundred fifteen million, six hundred forty-two thousand, six hundred forty-four".