2136646345 has 4 divisors (see below), whose sum is σ = 2563975620. Its totient is φ = 1709317072.

The previous prime is 2136646339. The next prime is 2136646357. The reversal of 2136646345 is 5436466312.

It is a happy number.

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 1371072784 + 765573561 = 37028^2 + 27669^2 .

It is a cyclic number.

It is not a de Polignac number, because 2136646345 - 2²³ = 2128257737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2136646298 and 2136646307.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213664630 + ... + 213664639.

It is an arithmetic number, because the mean of its divisors is an integer number (640993905).

Almost surely, 2^2136646345 is an apocalyptic number.

It is an amenable number.

2136646345 is a deficient number, since it is larger than the sum of its proper divisors (427329275).

2136646345 is an equidigital number, since it uses as much as digits as its factorization.

2136646345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427329274.

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

The square root of 2136646345 is about 46223.8720251776. The cubic root of 2136646345 is about 1287.9852259744.

The spelling of 2136646345 in words is "two billion, one hundred thirty-six million, six hundred forty-six thousand, three hundred forty-five".