13478791508 has 24 divisors (see below), whose sum is σ = 29031244032. Its totient is φ = 5332269024.

The previous prime is 13478791489. The next prime is 13478791511. The reversal of 13478791508 is 80519787431.

It is a super-2 number, since 2×13478791508² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 13478791508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18514460 + ... + 18515187.

It is an arithmetic number, because the mean of its divisors is an integer number (1209635168).

Almost surely, 2^13478791508 is an apocalyptic number.

It is an amenable number.

13478791508 is an abundant number, since it is smaller than the sum of its proper divisors (15552452524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13478791508 is a wasteful number, since it uses less digits than its factorization.

13478791508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37029671 (or 37029669 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 53.

The spelling of 13478791508 in words is "thirteen billion, four hundred seventy-eight million, seven hundred ninety-one thousand, five hundred eight".