16821415488 has 56 divisors (see below), whose sum is σ = 44520014592. Its totient is φ = 5605456384.

The previous prime is 16821415453. The next prime is 16821415511. The reversal of 16821415488 is 88451412861.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 740881 + ... + 763247.

Almost surely, 2^16821415488 is an apocalyptic number.

It is an amenable number.

16821415488 is an abundant number, since it is smaller than the sum of its proper divisors (27698599104).

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

16821415488 is a wasteful number, since it uses less digits than its factorization.

16821415488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26299 (or 26289 counting only the distinct ones).

The product of its digits is 491520, while the sum is 48.

The spelling of 16821415488 in words is "sixteen billion, eight hundred twenty-one million, four hundred fifteen thousand, four hundred eighty-eight".