13123157108 has 6 divisors (see below), whose sum is σ = 22965524946. Its totient is φ = 6561578552.

The previous prime is 13123157059. The next prime is 13123157137. The reversal of 13123157108 is 80175132131.

It can be written as a sum of positive squares in only one way, i.e., 7719731044 + 5403426064 = 87862^2 + 73508^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1640394635 + ... + 1640394642.

It is an arithmetic number, because the mean of its divisors is an integer number (3827587491).

Almost surely, 2^13123157108 is an apocalyptic number.

It is an amenable number.

13123157108 is a deficient number, since it is larger than the sum of its proper divisors (9842367838).

13123157108 is a wasteful number, since it uses less digits than its factorization.

13123157108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280789281 (or 3280789279 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

Adding to 13123157108 its reverse (80175132131), we get a palindrome (93298289239).

The spelling of 13123157108 in words is "thirteen billion, one hundred twenty-three million, one hundred fifty-seven thousand, one hundred eight".