2136643465 has 16 divisors (see below), whose sum is σ = 2811718656. Its totient is φ = 1545779200.

The previous prime is 2136643459. The next prime is 2136643493. The reversal of 2136643465 is 5643466312.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2136643465 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 91192 + ... + 112201.

It is an arithmetic number, because the mean of its divisors is an integer number (175732416).

Almost surely, 2^2136643465 is an apocalyptic number.

It is an amenable number.

2136643465 is a deficient number, since it is larger than the sum of its proper divisors (675075191).

2136643465 is a wasteful number, since it uses less digits than its factorization.

2136643465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203600.

The product of its digits is 311040, while the sum is 40.

The square root of 2136643465 is about 46223.8408724329. The cubic root of 2136643465 is about 1287.9846472795.

The spelling of 2136643465 in words is "two billion, one hundred thirty-six million, six hundred forty-three thousand, four hundred sixty-five".