2809723810836 has 24 divisors (see below), whose sum is σ = 6556057719904. Its totient is φ = 936569532960.

The previous prime is 2809723810823. The next prime is 2809723810841. The reversal of 2809723810836 is 6380183279082.

It is a super-2 number, since 2×2809723810836² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2171706 + ... + 3214926.

Almost surely, 2^{2809723810836} is an apocalyptic number.

It is an amenable number.

2809723810836 is an abundant number, since it is smaller than the sum of its proper divisors (3746333909068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2809723810836 is a wasteful number, since it uses less digits than its factorization.

2809723810836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267671 (or 1267669 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 57.

The spelling of 2809723810836 in words is "two trillion, eight hundred nine billion, seven hundred twenty-three million, eight hundred ten thousand, eight hundred thirty-six".