16421146216503 has 32 divisors (see below), whose sum is σ = 25257711582720. Its totient is φ = 9295390431360.

The previous prime is 16421146216499. The next prime is 16421146216567. The reversal of 16421146216503 is 30561264112461.

It is not a de Polignac number, because 16421146216503 - 2² = 16421146216499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16421146216303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52669293 + ... + 52980153.

It is an arithmetic number, because the mean of its divisors is an integer number (789303486960).

Almost surely, 2^{16421146216503} is an apocalyptic number.

16421146216503 is a deficient number, since it is larger than the sum of its proper divisors (8836565366217).

16421146216503 is a wasteful number, since it uses less digits than its factorization.

16421146216503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334487.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 16421146216503 in words is "sixteen trillion, four hundred twenty-one billion, one hundred forty-six million, two hundred sixteen thousand, five hundred three".