13987778316 has 24 divisors (see below), whose sum is σ = 32689891584. Its totient is φ = 4655201040.

The previous prime is 13987778309. The next prime is 13987778317. The reversal of 13987778316 is 61387778931.

It is a self number, because there is not a number n which added to its sum of digits gives 13987778316.

It is not an unprimeable number, because it can be changed into a prime (13987778317) 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, 916080 + ... + 931223.

It is an arithmetic number, because the mean of its divisors is an integer number (1362078816).

Almost surely, 2^13987778316 is an apocalyptic number.

It is an amenable number.

13987778316 is an abundant number, since it is smaller than the sum of its proper divisors (18702113268).

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

13987778316 is a wasteful number, since it uses less digits than its factorization.

13987778316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847941 (or 1847939 counting only the distinct ones).

The product of its digits is 10668672, while the sum is 60.

The spelling of 13987778316 in words is "thirteen billion, nine hundred eighty-seven million, seven hundred seventy-eight thousand, three hundred sixteen".