27158071988 has 6 divisors (see below), whose sum is σ = 47526625986. Its totient is φ = 13579035992.

The previous prime is 27158071987. The next prime is 27158072023. The reversal of 27158071988 is 88917085172.

It can be written as a sum of positive squares in only one way, i.e., 14493270544 + 12664801444 = 120388^2 + 112538^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27158071981) 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 as a sum of consecutive naturals, namely, 3394758995 + ... + 3394759002.

It is an arithmetic number, because the mean of its divisors is an integer number (7921104331).

Almost surely, 2^27158071988 is an apocalyptic number.

It is an amenable number.

27158071988 is a deficient number, since it is larger than the sum of its proper divisors (20368553998).

27158071988 is a wasteful number, since it uses less digits than its factorization.

27158071988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6789518001 (or 6789517999 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 56.

The spelling of 27158071988 in words is "twenty-seven billion, one hundred fifty-eight million, seventy-one thousand, nine hundred eighty-eight".