1227732745887 has 16 divisors (see below), whose sum is σ = 1818880538880. Its totient is φ = 818480752056.

The previous prime is 1227732745867. The next prime is 1227732745901. The reversal of 1227732745887 is 7885472377221.

1227732745887 is a `hidden beast` number, since 1 + 2 + 2 + 77 + 32 + 7 + 458 + 87 = 666.

It is not a de Polignac number, because 1227732745887 - 2²⁴ = 1227715968671 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1227732745867) 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, 4915888 + ... + 5159594.

It is an arithmetic number, because the mean of its divisors is an integer number (113680033680).

Almost surely, 2^{1227732745887} is an apocalyptic number.

1227732745887 is a deficient number, since it is larger than the sum of its proper divisors (591147792993).

1227732745887 is a wasteful number, since it uses less digits than its factorization.

1227732745887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430299 (or 430293 counting only the distinct ones).

The product of its digits is 73758720, while the sum is 63.

The spelling of 1227732745887 in words is "one trillion, two hundred twenty-seven billion, seven hundred thirty-two million, seven hundred forty-five thousand, eight hundred eighty-seven".