1227165565264 has 20 divisors (see below), whose sum is σ = 2377854729556. Its totient is φ = 613525635072.

The previous prime is 1227165565259. The next prime is 1227165565279. The reversal of 1227165565264 is 4625655617221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 551021166864 + 676144398400 = 742308^2 + 822280^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3394299 + ... + 3738394.

Almost surely, 2^{1227165565264} is an apocalyptic number.

It is an amenable number.

1227165565264 is a deficient number, since it is larger than the sum of its proper divisors (1150689164292).

1227165565264 is a wasteful number, since it uses less digits than its factorization.

1227165565264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7143454 (or 7143448 counting only the distinct ones).

The product of its digits is 6048000, while the sum is 52.

The spelling of 1227165565264 in words is "one trillion, two hundred twenty-seven billion, one hundred sixty-five million, five hundred sixty-five thousand, two hundred sixty-four".