11491389807136 has 36 divisors (see below), whose sum is σ = 22759957754478. Its totient is φ = 5711289101312.

The previous prime is 11491389807109. The next prime is 11491389807167. The reversal of 11491389807136 is 63170898319411.

It can be written as a sum of positive squares in only one way, i.e., 9785910523536 + 1705479283600 = 3128244^2 + 1305940^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5545681 + ... + 7330576.

Almost surely, 2^{11491389807136} is an apocalyptic number.

11491389807136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11491389807136 is a deficient number, since it is larger than the sum of its proper divisors (11268567947342).

11491389807136 is an equidigital number, since it uses as much as digits as its factorization.

11491389807136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12876601 (or 12876426 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 61.

The spelling of 11491389807136 in words is "eleven trillion, four hundred ninety-one billion, three hundred eighty-nine million, eight hundred seven thousand, one hundred thirty-six".