13246978869 has 40 divisors (see below), whose sum is σ = 21315267072. Its totient is φ = 8174818080.

The previous prime is 13246978861. The next prime is 13246978879. The reversal of 13246978869 is 96887964231.

13246978869 is a `hidden beast` number, since 1 + 32 + 469 + 7 + 88 + 69 = 666.

It is not a de Polignac number, because 13246978869 - 2³ = 13246978861 is a prime.

It is a super-2 number, since 2×13246978869² (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 (13246978861) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 56934 + ... + 172439.

Almost surely, 2^13246978869 is an apocalyptic number.

It is an amenable number.

13246978869 is a deficient number, since it is larger than the sum of its proper divisors (8068288203).

13246978869 is a wasteful number, since it uses less digits than its factorization.

13246978869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229439 (or 229430 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 63.

The spelling of 13246978869 in words is "thirteen billion, two hundred forty-six million, nine hundred seventy-eight thousand, eight hundred sixty-nine".