13591868991 has 16 divisors (see below), whose sum is σ = 18394128000. Its totient is φ = 8926375328.

The previous prime is 13591868977. The next prime is 13591868993. The reversal of 13591868991 is 19986819531.

It is a cyclic number.

It is not a de Polignac number, because 13591868991 - 2¹⁴ = 13591852607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13591868993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60816 + ... + 175733.

It is an arithmetic number, because the mean of its divisors is an integer number (1149633000).

Almost surely, 2^13591868991 is an apocalyptic number.

13591868991 is a deficient number, since it is larger than the sum of its proper divisors (4802259009).

13591868991 is a wasteful number, since it uses less digits than its factorization.

13591868991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236838.

The product of its digits is 4199040, while the sum is 60.

The spelling of 13591868991 in words is "thirteen billion, five hundred ninety-one million, eight hundred sixty-eight thousand, nine hundred ninety-one".