27865518959361 has 16 divisors (see below), whose sum is σ = 39171480535040. Its totient is φ = 17571384023760.

The previous prime is 27865518959297. The next prime is 27865518959389. The reversal of 27865518959361 is 16395981556872.

It is not a de Polignac number, because 27865518959361 - 2⁶ = 27865518959297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27865518259361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387340225 + ... + 387412158.

It is an arithmetic number, because the mean of its divisors is an integer number (2448217533440).

Almost surely, 2^{27865518959361} is an apocalyptic number.

It is an amenable number.

27865518959361 is a deficient number, since it is larger than the sum of its proper divisors (11305961575679).

27865518959361 is a wasteful number, since it uses less digits than its factorization.

27865518959361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774753036.

The product of its digits is 979776000, while the sum is 75.

The spelling of 27865518959361 in words is "twenty-seven trillion, eight hundred sixty-five billion, five hundred eighteen million, nine hundred fifty-nine thousand, three hundred sixty-one".