1311255402536 has 32 divisors (see below), whose sum is σ = 2473843404000. Its totient is φ = 651564336960.

The previous prime is 1311255402533. The next prime is 1311255402547. The reversal of 1311255402536 is 6352045521131.

It is a self number, because there is not a number n which added to its sum of digits gives 1311255402536.

It is not an unprimeable number, because it can be changed into a prime (1311255402533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40341251 + ... + 40373741.

It is an arithmetic number, because the mean of its divisors is an integer number (77307606375).

Almost surely, 2^{1311255402536} is an apocalyptic number.

It is an amenable number.

1311255402536 is a deficient number, since it is larger than the sum of its proper divisors (1162588001464).

1311255402536 is a wasteful number, since it uses less digits than its factorization.

1311255402536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63609 (or 63605 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 1311255402536 in words is "one trillion, three hundred eleven billion, two hundred fifty-five million, four hundred two thousand, five hundred thirty-six".