27278026128 has 80 divisors (see below), whose sum is σ = 81702330240. Its totient is φ = 8697338496.

The previous prime is 27278026123. The next prime is 27278026147. The reversal of 27278026128 is 82162087272.

27278026128 is a `hidden beast` number, since 2 + 7 + 27 + 8 + 0 + 2 + 612 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (27278026123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1362751 + ... + 1382622.

It is an arithmetic number, because the mean of its divisors is an integer number (1021279128).

Almost surely, 2^27278026128 is an apocalyptic number.

It is an amenable number.

27278026128 is an abundant number, since it is smaller than the sum of its proper divisors (54424304112).

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

27278026128 is a wasteful number, since it uses less digits than its factorization.

27278026128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2745413 (or 2745401 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The spelling of 27278026128 in words is "twenty-seven billion, two hundred seventy-eight million, twenty-six thousand, one hundred twenty-eight".