13447138809 has 32 divisors (see below), whose sum is σ = 19560812544. Its totient is φ = 8167587840.

The previous prime is 13447138787. The next prime is 13447138829. The reversal of 13447138809 is 90883174431.

It is a happy number.

It is not a de Polignac number, because 13447138809 - 2⁷ = 13447138681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13447138829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1444249 + ... + 1453529.

It is an arithmetic number, because the mean of its divisors is an integer number (611275392).

Almost surely, 2^13447138809 is an apocalyptic number.

It is an amenable number.

13447138809 is a deficient number, since it is larger than the sum of its proper divisors (6113673735).

13447138809 is a wasteful number, since it uses less digits than its factorization.

13447138809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9777.

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 13447138809 in words is "thirteen billion, four hundred forty-seven million, one hundred thirty-eight thousand, eight hundred nine".