2136680365 has 4 divisors (see below), whose sum is σ = 2564016444. Its totient is φ = 1709344288.

The previous prime is 2136680333. The next prime is 2136680369. The reversal of 2136680365 is 5630866312.

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 1703790729 + 432889636 = 41277^2 + 20806^2 .

It is a cyclic number.

It is not a de Polignac number, because 2136680365 - 2⁵ = 2136680333 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2136680369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213668032 + ... + 213668041.

It is an arithmetic number, because the mean of its divisors is an integer number (641004111).

Almost surely, 2^2136680365 is an apocalyptic number.

It is an amenable number.

2136680365 is a deficient number, since it is larger than the sum of its proper divisors (427336079).

2136680365 is an equidigital number, since it uses as much as digits as its factorization.

2136680365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427336078.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 2136680365 is about 46224.2400153859. The cubic root of 2136680365 is about 1287.9920617687.

The spelling of 2136680365 in words is "two billion, one hundred thirty-six million, six hundred eighty thousand, three hundred sixty-five".