16161623247769 has 4 divisors (see below), whose sum is σ = 17112306968244. Its totient is φ = 15210939527296.

The previous prime is 16161623247767. The next prime is 16161623247811. The reversal of 16161623247769 is 96774232616161.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4438100622400 + 11723522625369 = 2106680^2 + 3423963^2 .

It is a cyclic number.

It is not a de Polignac number, because 16161623247769 - 2¹ = 16161623247767 is a prime.

It is a super-2 number, since 2×16161623247769² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16161623247767) 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 3 ways as a sum of consecutive naturals, for example, 475341860212 + ... + 475341860245.

It is an arithmetic number, because the mean of its divisors is an integer number (4278076742061).

Almost surely, 2^{16161623247769} is an apocalyptic number.

It is an amenable number.

16161623247769 is a deficient number, since it is larger than the sum of its proper divisors (950683720475).

16161623247769 is an equidigital number, since it uses as much as digits as its factorization.

16161623247769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950683720474.

The product of its digits is 27433728, while the sum is 61.

The spelling of 16161623247769 in words is "sixteen trillion, one hundred sixty-one billion, six hundred twenty-three million, two hundred forty-seven thousand, seven hundred sixty-nine".