16124664021 has 8 divisors (see below), whose sum is σ = 21505777824. Its totient is φ = 10746663120.

The previous prime is 16124663983. The next prime is 16124664037. The reversal of 16124664021 is 12046642161.

16124664021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16124664021 - 2⁶ = 16124663957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16124664821) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 766111 + ... + 786876.

It is an arithmetic number, because the mean of its divisors is an integer number (2688222228).

Almost surely, 2^16124664021 is an apocalyptic number.

It is an amenable number.

16124664021 is a deficient number, since it is larger than the sum of its proper divisors (5381113803).

16124664021 is a wasteful number, since it uses less digits than its factorization.

16124664021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556451.

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 16124664021 in words is "sixteen billion, one hundred twenty-four million, six hundred sixty-four thousand, twenty-one".