13118478477 has 24 divisors (see below), whose sum is σ = 19076652000. Its totient is φ = 8014788288.

The previous prime is 13118478473. The next prime is 13118478479. The reversal of 13118478477 is 77487481131.

It is a happy number.

It is not a de Polignac number, because 13118478477 - 2² = 13118478473 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13118478473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22602 + ... + 163547.

It is an arithmetic number, because the mean of its divisors is an integer number (794860500).

Almost surely, 2^13118478477 is an apocalyptic number.

It is an amenable number.

13118478477 is a deficient number, since it is larger than the sum of its proper divisors (5958173523).

13118478477 is a wasteful number, since it uses less digits than its factorization.

13118478477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186317 (or 186304 counting only the distinct ones).

The product of its digits is 1053696, while the sum is 51.

The spelling of 13118478477 in words is "thirteen billion, one hundred eighteen million, four hundred seventy-eight thousand, four hundred seventy-seven".