16021451731688 has 64 divisors (see below), whose sum is σ = 33108655003200. Its totient is φ = 7223341847040.

The previous prime is 16021451731679. The next prime is 16021451731717. The reversal of 16021451731688 is 88613715412061.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9659018 + ... + 11195513.

It is an arithmetic number, because the mean of its divisors is an integer number (517322734425).

Almost surely, 2^{16021451731688} is an apocalyptic number.

It is an amenable number.

16021451731688 is an abundant number, since it is smaller than the sum of its proper divisors (17087203271512).

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

16021451731688 is a wasteful number, since it uses less digits than its factorization.

16021451731688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20854722 (or 20854718 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 16021451731688 in words is "sixteen trillion, twenty-one billion, four hundred fifty-one million, seven hundred thirty-one thousand, six hundred eighty-eight".