27638120836 has 24 divisors (see below), whose sum is σ = 48722612120. Its totient is φ = 13717734912.

The previous prime is 27638120833. The next prime is 27638120837. The reversal of 27638120836 is 63802183672.

It can be written as a sum of positive squares in 4 ways, for example, as 15201410436 + 12436710400 = 123294^2 + 111520^2 .

It is a super-3 number, since 3×27638120836³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (27638120833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263926 + ... + 353458.

Almost surely, 2^27638120836 is an apocalyptic number.

It is an amenable number.

27638120836 is a deficient number, since it is larger than the sum of its proper divisors (21084491284).

27638120836 is a wasteful number, since it uses less digits than its factorization.

27638120836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90103 (or 90101 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 27638120836 in words is "twenty-seven billion, six hundred thirty-eight million, one hundred twenty thousand, eight hundred thirty-six".