27800863365 has 64 divisors (see below), whose sum is σ = 51116313600. Its totient is φ = 12760473600.

The previous prime is 27800863331. The next prime is 27800863367. The reversal of 27800863365 is 56336800872.

It is not a de Polignac number, because 27800863365 - 2¹⁴ = 27800846981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27800863367) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6201925 + ... + 6206405.

It is an arithmetic number, because the mean of its divisors is an integer number (798692400).

Almost surely, 2^27800863365 is an apocalyptic number.

It is an amenable number.

27800863365 is a deficient number, since it is larger than the sum of its proper divisors (23315450235).

27800863365 is a wasteful number, since it uses less digits than its factorization.

27800863365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6498.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 27800863365 in words is "twenty-seven billion, eight hundred million, eight hundred sixty-three thousand, three hundred sixty-five".