1115931912591 has 16 divisors (see below), whose sum is σ = 1540243440000. Its totient is φ = 717821730528.

The previous prime is 1115931912587. The next prime is 1115931912647. The reversal of 1115931912591 is 1952191395111.

It is not a de Polignac number, because 1115931912591 - 2² = 1115931912587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1115931912591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115931912391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4148041 + ... + 4408866.

It is an arithmetic number, because the mean of its divisors is an integer number (96265215000).

Almost surely, 2^{1115931912591} is an apocalyptic number.

1115931912591 is a deficient number, since it is larger than the sum of its proper divisors (424311527409).

1115931912591 is a wasteful number, since it uses less digits than its factorization.

1115931912591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8558438.

The product of its digits is 109350, while the sum is 48.

The spelling of 1115931912591 in words is "one trillion, one hundred fifteen billion, nine hundred thirty-one million, nine hundred twelve thousand, five hundred ninety-one".