12270999865 has 16 divisors (see below), whose sum is σ = 15133294800. Its totient is φ = 9545091840.

The previous prime is 12270999833. The next prime is 12270999887. The reversal of 12270999865 is 56899907221.

It can be written as a sum of positive squares in 8 ways, for example, as 544708921 + 11726290944 = 23339^2 + 108288^2 .

It is not a de Polignac number, because 12270999865 - 2⁵ = 12270999833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265155 + ... + 307975.

It is an arithmetic number, because the mean of its divisors is an integer number (945830925).

Almost surely, 2^12270999865 is an apocalyptic number.

It is an amenable number.

12270999865 is a deficient number, since it is larger than the sum of its proper divisors (2862294935).

12270999865 is a wasteful number, since it uses less digits than its factorization.

12270999865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44412.

The product of its (nonzero) digits is 4898880, while the sum is 58.

The spelling of 12270999865 in words is "twelve billion, two hundred seventy million, nine hundred ninety-nine thousand, eight hundred sixty-five".