16721214652 has 6 divisors (see below), whose sum is σ = 29262125648. Its totient is φ = 8360607324.

The previous prime is 16721214617. The next prime is 16721214667. The reversal of 16721214652 is 25641212761.

It is a super-2 number, since 2×16721214652² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2090151828 + ... + 2090151835.

Almost surely, 2^16721214652 is an apocalyptic number.

It is an amenable number.

16721214652 is a deficient number, since it is larger than the sum of its proper divisors (12540910996).

16721214652 is a wasteful number, since it uses less digits than its factorization.

16721214652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4180303667 (or 4180303665 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The spelling of 16721214652 in words is "sixteen billion, seven hundred twenty-one million, two hundred fourteen thousand, six hundred fifty-two".