13491638743 has 8 divisors (see below), whose sum is σ = 15192930816. Its totient is φ = 11869476600.

The previous prime is 13491638707. The next prime is 13491638759. The reversal of 13491638743 is 34783619431.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13491638743 - 2²¹ = 13489541591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13491638543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19782121 + ... + 19782802.

It is an arithmetic number, because the mean of its divisors is an integer number (1899116352).

Almost surely, 2^13491638743 is an apocalyptic number.

13491638743 is a deficient number, since it is larger than the sum of its proper divisors (1701292073).

13491638743 is a wasteful number, since it uses less digits than its factorization.

13491638743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39564965.

The product of its digits is 1306368, while the sum is 49.

The spelling of 13491638743 in words is "thirteen billion, four hundred ninety-one million, six hundred thirty-eight thousand, seven hundred forty-three".