27105515387 has 16 divisors (see below), whose sum is σ = 29843569920. Its totient is φ = 24503925600.

The previous prime is 27105515383. The next prime is 27105515399. The reversal of 27105515387 is 78351550172.

It is a cyclic number.

It is not a de Polignac number, because 27105515387 - 2² = 27105515383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27105515383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110312 + ... + 257642.

It is an arithmetic number, because the mean of its divisors is an integer number (1865223120).

Almost surely, 2^27105515387 is an apocalyptic number.

27105515387 is a deficient number, since it is larger than the sum of its proper divisors (2738054533).

27105515387 is a wasteful number, since it uses less digits than its factorization.

27105515387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147794.

The product of its (nonzero) digits is 294000, while the sum is 44.

The spelling of 27105515387 in words is "twenty-seven billion, one hundred five million, five hundred fifteen thousand, three hundred eighty-seven".