1281368138902 has 48 divisors (see below), whose sum is σ = 2114590317840. Its totient is φ = 580303374336.

The previous prime is 1281368138887. The next prime is 1281368138927. The reversal of 1281368138902 is 2098318631821.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1281368138902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8705374 + ... + 8851342.

It is an arithmetic number, because the mean of its divisors is an integer number (44053964955).

Almost surely, 2^{1281368138902} is an apocalyptic number.

1281368138902 is a deficient number, since it is larger than the sum of its proper divisors (833222178938).

1281368138902 is a wasteful number, since it uses less digits than its factorization.

1281368138902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146353 (or 146324 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 52.

The spelling of 1281368138902 in words is "one trillion, two hundred eighty-one billion, three hundred sixty-eight million, one hundred thirty-eight thousand, nine hundred two".