836643145 has 16 divisors (see below), whose sum is σ = 1096017552. Its totient is φ = 609361920.

The previous prime is 836643047. The next prime is 836643179. The reversal of 836643145 is 541346638.

836643145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 45369 + 836597776 = 213^2 + 28924^2 .

It is a de Polignac number, because none of the positive numbers 2^k-836643145 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 836643098 and 836643107.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83416 + ... + 92905.

It is an arithmetic number, because the mean of its divisors is an integer number (68501097).

Almost surely, 2^836643145 is an apocalyptic number.

It is an amenable number.

836643145 is a deficient number, since it is larger than the sum of its proper divisors (259374407).

836643145 is a wasteful number, since it uses less digits than its factorization.

836643145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176412.

The product of its digits is 207360, while the sum is 40.

The square root of 836643145 is about 28924.7842688584. The cubic root of 836643145 is about 942.2802438959.

The spelling of 836643145 in words is "eight hundred thirty-six million, six hundred forty-three thousand, one hundred forty-five".