27765215115 has 32 divisors (see below), whose sum is σ = 48486297600. Its totient is φ = 13455429120.

The previous prime is 27765215089. The next prime is 27765215123. The reversal of 27765215115 is 51151256772.

It is not a de Polignac number, because 27765215115 - 2⁵ = 27765215083 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 311766 + ... + 390804.

It is an arithmetic number, because the mean of its divisors is an integer number (1515196800).

Almost surely, 2^27765215115 is an apocalyptic number.

27765215115 is a deficient number, since it is larger than the sum of its proper divisors (20721082485).

27765215115 is a wasteful number, since it uses less digits than its factorization.

27765215115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81187.

The product of its digits is 147000, while the sum is 42.

The spelling of 27765215115 in words is "twenty-seven billion, seven hundred sixty-five million, two hundred fifteen thousand, one hundred fifteen".