13791523791 has 4 divisors (see below), whose sum is σ = 18388698392. Its totient is φ = 9194349192.

The previous prime is 13791523783. The next prime is 13791523807. The reversal of 13791523791 is 19732519731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19732519731 = 3 ⋅6577506577.

It is not a de Polignac number, because 13791523791 - 2³ = 13791523783 is a prime.

It is a super-2 number, since 2×13791523791² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13791523791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13791523721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2298587296 + ... + 2298587301.

It is an arithmetic number, because the mean of its divisors is an integer number (4597174598).

Almost surely, 2^13791523791 is an apocalyptic number.

13791523791 is a deficient number, since it is larger than the sum of its proper divisors (4597174601).

13791523791 is an equidigital number, since it uses as much as digits as its factorization.

13791523791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4597174600.

The product of its digits is 357210, while the sum is 48.

The spelling of 13791523791 in words is "thirteen billion, seven hundred ninety-one million, five hundred twenty-three thousand, seven hundred ninety-one".