13311139779 has 56 divisors (see below), whose sum is σ = 22895814240. Its totient is φ = 7577307648.

The previous prime is 13311139717. The next prime is 13311139789. The reversal of 13311139779 is 97793111331.

It is a happy number.

It is not a de Polignac number, because 13311139779 - 2¹² = 13311135683 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (13311139789) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1367859 + ... + 1377555.

Almost surely, 2^13311139779 is an apocalyptic number.

13311139779 is a deficient number, since it is larger than the sum of its proper divisors (9584674461).

13311139779 is an frugal number, since it uses more digits than its factorization.

13311139779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9991 (or 9976 counting only the distinct ones).

The product of its digits is 107163, while the sum is 45.

The spelling of 13311139779 in words is "thirteen billion, three hundred eleven million, one hundred thirty-nine thousand, seven hundred seventy-nine".