27287265976321 has 4 divisors (see below), whose sum is σ = 29386286436052. Its totient is φ = 25188245516592.

The previous prime is 27287265976309. The next prime is 27287265976339. The reversal of 27287265976321 is 12367956278272.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17748433726321 + 9538832250000 = 4212889^2 + 3088500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27287265976321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27287265976301) 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 3 ways as a sum of consecutive naturals, for example, 1049510229846 + ... + 1049510229871.

It is an arithmetic number, because the mean of its divisors is an integer number (7346571609013).

Almost surely, 2^{27287265976321} is an apocalyptic number.

It is an amenable number.

27287265976321 is a deficient number, since it is larger than the sum of its proper divisors (2099020459731).

27287265976321 is a wasteful number, since it uses less digits than its factorization.

27287265976321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099020459730.

The product of its digits is 213373440, while the sum is 67.

The spelling of 27287265976321 in words is "twenty-seven trillion, two hundred eighty-seven billion, two hundred sixty-five million, nine hundred seventy-six thousand, three hundred twenty-one".