7813273636 has 18 divisors (see below), whose sum is σ = 15905593158. Its totient is φ = 3348545760.

The previous prime is 7813273631. The next prime is 7813273639. The reversal of 7813273636 is 6363723187.

It can be written as a sum of positive squares in only one way, i.e., 7293160000 + 520113636 = 85400^2 + 22806^2 .

It is a super-4 number, since 4×7813273636⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (7813273631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19931625 + ... + 19932016.

Almost surely, 2^7813273636 is an apocalyptic number.

It is an amenable number.

7813273636 is an abundant number, since it is smaller than the sum of its proper divisors (8092319522).

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

7813273636 is a wasteful number, since it uses less digits than its factorization.

7813273636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39863659 (or 39863650 counting only the distinct ones).

The product of its digits is 762048, while the sum is 46.

The square root of 7813273636 is about 88392.7238860756. The cubic root of 7813273636 is about 1984.3168098971.

The spelling of 7813273636 in words is "seven billion, eight hundred thirteen million, two hundred seventy-three thousand, six hundred thirty-six".