16221463461555 has 32 divisors (see below), whose sum is σ = 28319955671808. Its totient is φ = 7863249609600.

The previous prime is 16221463461503. The next prime is 16221463461557. The reversal of 16221463461555 is 55516436412261.

It is not a de Polignac number, because 16221463461555 - 2⁹ = 16221463461043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16221463461498 and 16221463461507.

It is not an unprimeable number, because it can be changed into a prime (16221463461557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9875049 + ... + 11399978.

It is an arithmetic number, because the mean of its divisors is an integer number (884998614744).

Almost surely, 2^{16221463461555} is an apocalyptic number.

16221463461555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16221463461555 is a deficient number, since it is larger than the sum of its proper divisors (12098492210253).

16221463461555 is a wasteful number, since it uses less digits than its factorization.

16221463461555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21279667.

The product of its digits is 5184000, while the sum is 51.

The spelling of 16221463461555 in words is "sixteen trillion, two hundred twenty-one billion, four hundred sixty-three million, four hundred sixty-one thousand, five hundred fifty-five".