13120442756 has 6 divisors (see below), whose sum is σ = 22960774830. Its totient is φ = 6560221376.

The previous prime is 13120442737. The next prime is 13120442773. The reversal of 13120442756 is 65724402131.

It can be written as a sum of positive squares in only one way, i.e., 13102465156 + 17977600 = 114466^2 + 4240^2 .

It is a super-2 number, since 2×13120442756² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1640055341 + ... + 1640055348.

It is an arithmetic number, because the mean of its divisors is an integer number (3826795805).

Almost surely, 2^13120442756 is an apocalyptic number.

It is an amenable number.

13120442756 is a deficient number, since it is larger than the sum of its proper divisors (9840332074).

13120442756 is a wasteful number, since it uses less digits than its factorization.

13120442756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3280110693 (or 3280110691 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

Adding to 13120442756 its reverse (65724402131), we get a palindrome (78844844887).

The spelling of 13120442756 in words is "thirteen billion, one hundred twenty million, four hundred forty-two thousand, seven hundred fifty-six".