27750805065 has 32 divisors (see below), whose sum is σ = 49607376000. Its totient is φ = 14718646080.

The previous prime is 27750805057. The next prime is 27750805087. The reversal of 27750805065 is 56050805772.

It is not a de Polignac number, because 27750805065 - 2³ = 27750805057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 27750805065.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 543415 + ... + 592284.

It is an arithmetic number, because the mean of its divisors is an integer number (1550230500).

Almost surely, 2^27750805065 is an apocalyptic number.

It is an amenable number.

27750805065 is a deficient number, since it is larger than the sum of its proper divisors (21856570935).

27750805065 is a wasteful number, since it uses less digits than its factorization.

27750805065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135894 (or 1135888 counting only the distinct ones).

The product of its (nonzero) digits is 588000, while the sum is 45.

The spelling of 27750805065 in words is "twenty-seven billion, seven hundred fifty million, eight hundred five thousand, sixty-five".