13299785778 has 16 divisors (see below), whose sum is σ = 26652459456. Its totient is φ = 4424447280.

The previous prime is 13299785777. The next prime is 13299785783. The reversal of 13299785778 is 87758799231.

It is not an unprimeable number, because it can be changed into a prime (13299785777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2200393 + ... + 2206428.

It is an arithmetic number, because the mean of its divisors is an integer number (1665778716).

Almost surely, 2^13299785778 is an apocalyptic number.

13299785778 is an abundant number, since it is smaller than the sum of its proper divisors (13352673678).

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

13299785778 is a wasteful number, since it uses less digits than its factorization.

13299785778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4407329.

The product of its digits is 53343360, while the sum is 66.

The spelling of 13299785778 in words is "thirteen billion, two hundred ninety-nine million, seven hundred eighty-five thousand, seven hundred seventy-eight".