13157314644 has 24 divisors (see below), whose sum is σ = 31045351680. Its totient is φ = 4336492864.

The previous prime is 13157314619. The next prime is 13157314649. The reversal of 13157314644 is 44641375131.

It is a super-2 number, since 2×13157314644² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13157314649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6158724 + ... + 6160859.

It is an arithmetic number, because the mean of its divisors is an integer number (1293556320).

Almost surely, 2^13157314644 is an apocalyptic number.

It is an amenable number.

13157314644 is an abundant number, since it is smaller than the sum of its proper divisors (17888037036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13157314644 is a wasteful number, since it uses less digits than its factorization.

13157314644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12319679 (or 12319677 counting only the distinct ones).

The product of its digits is 120960, while the sum is 39.

Adding to 13157314644 its reverse (44641375131), we get a palindrome (57798689775).

The spelling of 13157314644 in words is "thirteen billion, one hundred fifty-seven million, three hundred fourteen thousand, six hundred forty-four".