2169240936385 has 4 divisors (see below), whose sum is σ = 2603089123668. Its totient is φ = 1735392749104.

The previous prime is 2169240936367. The next prime is 2169240936389. The reversal of 2169240936385 is 5836390429612.

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 678858997041 + 1490381939344 = 823929^2 + 1220812^2 .

It is a cyclic number.

It is not a de Polignac number, because 2169240936385 - 2¹⁵ = 2169240903617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2169240936389) 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, 216924093634 + ... + 216924093643.

It is an arithmetic number, because the mean of its divisors is an integer number (650772280917).

Almost surely, 2^{2169240936385} is an apocalyptic number.

It is an amenable number.

2169240936385 is a deficient number, since it is larger than the sum of its proper divisors (433848187283).

2169240936385 is an equidigital number, since it uses as much as digits as its factorization.

2169240936385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433848187282.

The product of its (nonzero) digits is 16796160, while the sum is 58.

The spelling of 2169240936385 in words is "two trillion, one hundred sixty-nine billion, two hundred forty million, nine hundred thirty-six thousand, three hundred eighty-five".