16721226156 has 24 divisors (see below), whose sum is σ = 39018434224. Its totient is φ = 5573422080.

The previous prime is 16721226131. The next prime is 16721226169. The reversal of 16721226156 is 65162212761.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280416 + ... + 334776.

Almost surely, 2^16721226156 is an apocalyptic number.

It is an amenable number.

16721226156 is an abundant number, since it is smaller than the sum of its proper divisors (22297208068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16721226156 is a wasteful number, since it uses less digits than its factorization.

16721226156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80001 (or 79999 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The spelling of 16721226156 in words is "sixteen billion, seven hundred twenty-one million, two hundred twenty-six thousand, one hundred fifty-six".