16261352646663 has 4 divisors (see below), whose sum is σ = 21681803528888. Its totient is φ = 10840901764440.

The previous prime is 16261352646593. The next prime is 16261352646673. The reversal of 16261352646663 is 36664625316261.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 16261352646663 - 2⁹ = 16261352646151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16261352646673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2710225441108 + ... + 2710225441113.

It is an arithmetic number, because the mean of its divisors is an integer number (5420450882222).

Almost surely, 2^{16261352646663} is an apocalyptic number.

16261352646663 is a deficient number, since it is larger than the sum of its proper divisors (5420450882225).

16261352646663 is an equidigital number, since it uses as much as digits as its factorization.

16261352646663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5420450882224.

The product of its digits is 33592320, while the sum is 57.

The spelling of 16261352646663 in words is "sixteen trillion, two hundred sixty-one billion, three hundred fifty-two million, six hundred forty-six thousand, six hundred sixty-three".