27775892872 has 64 divisors (see below), whose sum is σ = 64145531520. Its totient is φ = 10980154368.

The previous prime is 27775892819. The next prime is 27775892873. The reversal of 27775892872 is 27829857772.

It is not an unprimeable number, because it can be changed into a prime (27775892873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1025488 + ... + 1052224.

It is an arithmetic number, because the mean of its divisors is an integer number (1002273930).

Almost surely, 2^27775892872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27775892872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32072765760).

27775892872 is an abundant number, since it is smaller than the sum of its proper divisors (36369638648).

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

27775892872 is a wasteful number, since it uses less digits than its factorization.

27775892872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28190 (or 28186 counting only the distinct ones).

The product of its digits is 55319040, while the sum is 64.

The spelling of 27775892872 in words is "twenty-seven billion, seven hundred seventy-five million, eight hundred ninety-two thousand, eight hundred seventy-two".