1227145043865 has 16 divisors (see below), whose sum is σ = 2114465306688. Its totient is φ = 604132944576.

The previous prime is 1227145043863. The next prime is 1227145043881. The reversal of 1227145043865 is 5683405417221.

It is not a de Polignac number, because 1227145043865 - 2¹ = 1227145043863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1227145043863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3146525559 + ... + 3146525948.

It is an arithmetic number, because the mean of its divisors is an integer number (132154081668).

Almost surely, 2^{1227145043865} is an apocalyptic number.

1227145043865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1227145043865 is a deficient number, since it is larger than the sum of its proper divisors (887320262823).

1227145043865 is a wasteful number, since it uses less digits than its factorization.

1227145043865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6293051528.

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 1227145043865 in words is "one trillion, two hundred twenty-seven billion, one hundred forty-five million, forty-three thousand, eight hundred sixty-five".