1281368227887 has 96 divisors (see below), whose sum is σ = 2082700698624. Its totient is φ = 752416358400.

The previous prime is 1281368227873. The next prime is 1281368227921. The reversal of 1281368227887 is 7887228631821.

1281368227887 is a `hidden beast` number, since 1 + 281 + 3 + 6 + 8 + 2 + 278 + 87 = 666.

It is not a de Polignac number, because 1281368227887 - 2⁷ = 1281368227759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281368227487) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 382839148 + ... + 382842494.

It is an arithmetic number, because the mean of its divisors is an integer number (21694798944).

Almost surely, 2^{1281368227887} is an apocalyptic number.

1281368227887 is a deficient number, since it is larger than the sum of its proper divisors (801332470737).

1281368227887 is a wasteful number, since it uses less digits than its factorization.

1281368227887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4029 (or 4026 counting only the distinct ones).

The product of its digits is 28901376, while the sum is 63.

The spelling of 1281368227887 in words is "one trillion, two hundred eighty-one billion, three hundred sixty-eight million, two hundred twenty-seven thousand, eight hundred eighty-seven".