16421874455 has 64 divisors (see below), whose sum is σ = 24429600000. Its totient is φ = 10592881152.

The previous prime is 16421874449. The next prime is 16421874467. The reversal of 16421874455 is 55447812461.

It is not a de Polignac number, because 16421874455 - 2²⁰ = 16420825879 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8424821 + ... + 8426769.

It is an arithmetic number, because the mean of its divisors is an integer number (381712500).

Almost surely, 2^16421874455 is an apocalyptic number.

16421874455 is a deficient number, since it is larger than the sum of its proper divisors (8007725545).

16421874455 is an frugal number, since it uses more digits than its factorization.

16421874455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026 (or 1978 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 47.

The spelling of 16421874455 in words is "sixteen billion, four hundred twenty-one million, eight hundred seventy-four thousand, four hundred fifty-five".