27730050138 has 80 divisors (see below), whose sum is σ = 71323169280. Its totient is φ = 7888199904.

The previous prime is 27730050113. The next prime is 27730050143. The reversal of 27730050138 is 83105003772.

27730050138 is a `hidden beast` number, since 277 + 300 + 50 + 1 + 38 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 206295 + ... + 313077.

It is an arithmetic number, because the mean of its divisors is an integer number (891539616).

Almost surely, 2^27730050138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27730050138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35661584640).

27730050138 is an abundant number, since it is smaller than the sum of its proper divisors (43593119142).

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

27730050138 is a wasteful number, since it uses less digits than its factorization.

27730050138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107033 (or 107024 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The spelling of 27730050138 in words is "twenty-seven billion, seven hundred thirty million, fifty thousand, one hundred thirty-eight".