13185778488 has 64 divisors (see below), whose sum is σ = 33484200960. Its totient is φ = 4326068736.

The previous prime is 13185778453. The next prime is 13185778511. The reversal of 13185778488 is 88487758131.

It is a super-2 number, since 2×13185778488² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2517120 + ... + 2522352.

It is an arithmetic number, because the mean of its divisors is an integer number (523190640).

Almost surely, 2^13185778488 is an apocalyptic number.

It is an amenable number.

13185778488 is an abundant number, since it is smaller than the sum of its proper divisors (20298422472).

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

13185778488 is a wasteful number, since it uses less digits than its factorization.

13185778488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6876 (or 6872 counting only the distinct ones).

The product of its digits is 12042240, while the sum is 60.

The spelling of 13185778488 in words is "thirteen billion, one hundred eighty-five million, seven hundred seventy-eight thousand, four hundred eighty-eight".