13313772491 has 4 divisors (see below), whose sum is σ = 13323960312. Its totient is φ = 13303584672.

The previous prime is 13313772469. The next prime is 13313772497. The reversal of 13313772491 is 19427731331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13313772491 - 2¹⁴ = 13313756107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13313772497) 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, 5091950 + ... + 5094563.

It is an arithmetic number, because the mean of its divisors is an integer number (3330990078).

Almost surely, 2^13313772491 is an apocalyptic number.

13313772491 is a deficient number, since it is larger than the sum of its proper divisors (10187821).

13313772491 is a wasteful number, since it uses less digits than its factorization.

13313772491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10187820.

The product of its digits is 95256, while the sum is 41.

The spelling of 13313772491 in words is "thirteen billion, three hundred thirteen million, seven hundred seventy-two thousand, four hundred ninety-one".