16261221615093 has 48 divisors (see below), whose sum is σ = 29523920165376. Its totient is φ = 8394850886400.

The previous prime is 16261221615077. The next prime is 16261221615103. The reversal of 16261221615093 is 39051612216261.

It is a happy number.

16261221615093 is a `hidden beast` number, since 1 + 6 + 2 + 6 + 1 + 2 + 21 + 615 + 0 + 9 + 3 = 666.

It is not a de Polignac number, because 16261221615093 - 2⁴ = 16261221615077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16261221615043) 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 47 ways as a sum of consecutive naturals, for example, 211184608 + ... + 211261593.

It is an arithmetic number, because the mean of its divisors is an integer number (615081670112).

Almost surely, 2^{16261221615093} is an apocalyptic number.

16261221615093 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16261221615093 is a deficient number, since it is larger than the sum of its proper divisors (13262698550283).

16261221615093 is a wasteful number, since it uses less digits than its factorization.

16261221615093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422446274 (or 422446271 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 16261221615093 in words is "sixteen trillion, two hundred sixty-one billion, two hundred twenty-one million, six hundred fifteen thousand, ninety-three".