16715453521 has 24 divisors (see below), whose sum is σ = 18775800000. Its totient is φ = 14856633792.

The previous prime is 16715453497. The next prime is 16715453539. The reversal of 16715453521 is 12535451761.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-16715453521 is a prime.

It is a super-2 number, since 2×16715453521² (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 (16715453551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1852980 + ... + 1861978.

It is an arithmetic number, because the mean of its divisors is an integer number (782325000).

Almost surely, 2^16715453521 is an apocalyptic number.

It is an amenable number.

16715453521 is a deficient number, since it is larger than the sum of its proper divisors (2060346479).

16715453521 is a wasteful number, since it uses less digits than its factorization.

16715453521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9433 (or 9420 counting only the distinct ones).

The product of its digits is 126000, while the sum is 40.

The spelling of 16715453521 in words is "sixteen billion, seven hundred fifteen million, four hundred fifty-three thousand, five hundred twenty-one".