16921216012488 has 32 divisors (see below), whose sum is σ = 42316052542560. Its totient is φ = 5638670336000.

The previous prime is 16921216012457. The next prime is 16921216012489. The reversal of 16921216012488 is 88421061212961.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 16921216012488.

It is not an unprimeable number, because it can be changed into a prime (16921216012489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108357945 + ... + 108513992.

It is an arithmetic number, because the mean of its divisors is an integer number (1322376641955).

Almost surely, 2^{16921216012488} is an apocalyptic number.

It is an amenable number.

16921216012488 is an abundant number, since it is smaller than the sum of its proper divisors (25394836530072).

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

16921216012488 is a wasteful number, since it uses less digits than its factorization.

16921216012488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216875197 (or 216875193 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 51.

The spelling of 16921216012488 in words is "sixteen trillion, nine hundred twenty-one billion, two hundred sixteen million, twelve thousand, four hundred eighty-eight".