27777321108 has 36 divisors (see below), whose sum is σ = 70221659508. Its totient is φ = 9258215040.

The previous prime is 27777321107. The next prime is 27777321109. The reversal of 27777321108 is 80112377772.

It is an interprime number because it is at equal distance from previous prime (27777321107) and next prime (27777321109).

It can be written as a sum of positive squares in 2 ways, for example, as 15400313604 + 12377007504 = 124098^2 + 111252^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27777321107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 418098 + ... + 479958.

It is an arithmetic number, because the mean of its divisors is an integer number (1950601653).

Almost surely, 2^27777321108 is an apocalyptic number.

It is an amenable number.

27777321108 is an abundant number, since it is smaller than the sum of its proper divisors (42444338400).

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

27777321108 is a wasteful number, since it uses less digits than its factorization.

27777321108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74344 (or 74339 counting only the distinct ones).

The product of its (nonzero) digits is 230496, while the sum is 45.

The spelling of 27777321108 in words is "twenty-seven billion, seven hundred seventy-seven million, three hundred twenty-one thousand, one hundred eight".