1191481113639 has 16 divisors (see below), whose sum is σ = 1592099131392. Its totient is φ = 792593332128.

The previous prime is 1191481113631. The next prime is 1191481113701. The reversal of 1191481113639 is 9363111841911.

It is a happy number.

It is not a de Polignac number, because 1191481113639 - 2³ = 1191481113631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191481113631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3221242 + ... + 3572024.

It is an arithmetic number, because the mean of its divisors is an integer number (99506195712).

Almost surely, 2^{1191481113639} is an apocalyptic number.

1191481113639 is a deficient number, since it is larger than the sum of its proper divisors (400618017753).

1191481113639 is a wasteful number, since it uses less digits than its factorization.

1191481113639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353246.

The product of its digits is 139968, while the sum is 48.

The spelling of 1191481113639 in words is "one trillion, one hundred ninety-one billion, four hundred eighty-one million, one hundred thirteen thousand, six hundred thirty-nine".