2105616769 has 3 divisors (see below), whose sum is σ = 2105662657. Its totient is φ = 2105570882.

The previous prime is 2105616767. The next prime is 2105616781. The reversal of 2105616769 is 9676165012.

The square root of 2105616769 is 45887.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 2105616769 - 2¹ = 2105616767 is a prime.

It is a super-2 number, since 2×2105616769² = 8867243955787998722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2105616763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 22944 + ... + 68830.

Almost surely, 2^2105616769 is an apocalyptic number.

2105616769 is the 45887-th square number.

2105616769 is the 22944-th centered octagonal number.

It is an amenable number.

2105616769 is a deficient number, since it is larger than the sum of its proper divisors (45888).

2105616769 is an frugal number, since it uses more digits than its factorization.

2105616769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91774 (or 45887 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The cubic root of 2105616769 is about 1281.7198497805.

The spelling of 2105616769 in words is "two billion, one hundred five million, six hundred sixteen thousand, seven hundred sixty-nine".