13316772437 has 4 divisors (see below), whose sum is σ = 13317733836. Its totient is φ = 13315811040.

The previous prime is 13316772389. The next prime is 13316772451. The reversal of 13316772437 is 73427761331.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1345349041 + 11971423396 = 36679^2 + 109414^2 .

It is a cyclic number.

It is not a de Polignac number, because 13316772437 - 2⁶ = 13316772373 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 (13316772457) 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 3 ways as a sum of consecutive naturals, for example, 459614 + ... + 487727.

It is an arithmetic number, because the mean of its divisors is an integer number (3329433459).

Almost surely, 2^13316772437 is an apocalyptic number.

It is an amenable number.

13316772437 is a deficient number, since it is larger than the sum of its proper divisors (961399).

13316772437 is an equidigital number, since it uses as much as digits as its factorization.

13316772437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961398.

The product of its digits is 444528, while the sum is 44.

The spelling of 13316772437 in words is "thirteen billion, three hundred sixteen million, seven hundred seventy-two thousand, four hundred thirty-seven".