16721627636 has 12 divisors (see below), whose sum is σ = 33443255328. Its totient is φ = 7166411832.

The previous prime is 16721627539. The next prime is 16721627639. The reversal of 16721627636 is 63672612761.

16721627636 is an admirable number.

It is a super-2 number, since 2×16721627636² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16721627639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298600466 + ... + 298600521.

It is an arithmetic number, because the mean of its divisors is an integer number (2786937944).

Almost surely, 2^16721627636 is an apocalyptic number.

It is an amenable number.

16721627636 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16721627636 is a wasteful number, since it uses less digits than its factorization.

16721627636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597200998 (or 597200996 counting only the distinct ones).

The product of its digits is 762048, while the sum is 47.

The spelling of 16721627636 in words is "sixteen billion, seven hundred twenty-one million, six hundred twenty-seven thousand, six hundred thirty-six".