1311495910388 has 12 divisors (see below), whose sum is σ = 2295742730820. Its totient is φ = 655569415872.

The previous prime is 1311495910363. The next prime is 1311495910433. The reversal of 1311495910388 is 8830195941131.

It can be written as a sum of positive squares in 2 ways, for example, as 142130508004 + 1169365402384 = 377002^2 + 1081372^2 .

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, 44618303 + ... + 44647686.

It is an arithmetic number, because the mean of its divisors is an integer number (191311894235).

Almost surely, 2^{1311495910388} is an apocalyptic number.

It is an amenable number.

1311495910388 is a deficient number, since it is larger than the sum of its proper divisors (984246820432).

1311495910388 is a wasteful number, since it uses less digits than its factorization.

1311495910388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89269666 (or 89269664 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 53.

The spelling of 1311495910388 in words is "one trillion, three hundred eleven billion, four hundred ninety-five million, nine hundred ten thousand, three hundred eighty-eight".