27866541465 has 48 divisors (see below), whose sum is σ = 55320789888. Its totient is φ = 12711644928.

The previous prime is 27866541431. The next prime is 27866541511. The reversal of 27866541465 is 56414566872.

27866541465 is a `hidden beast` number, since 2 + 7 + 86 + 65 + 41 + 465 = 666.

It is not a de Polignac number, because 27866541465 - 2⁹ = 27866540953 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52389 + ... + 241821.

It is an arithmetic number, because the mean of its divisors is an integer number (1152516456).

Almost surely, 2^27866541465 is an apocalyptic number.

It is an amenable number.

27866541465 is a deficient number, since it is larger than the sum of its proper divisors (27454248423).

27866541465 is a wasteful number, since it uses less digits than its factorization.

27866541465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189918 (or 189915 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 54.

The spelling of 27866541465 in words is "twenty-seven billion, eight hundred sixty-six million, five hundred forty-one thousand, four hundred sixty-five".