13776940840 has 96 divisors (see below), whose sum is σ = 34200218520. Its totient is φ = 4990761984.

The previous prime is 13776940819. The next prime is 13776940901. The reversal of 13776940840 is 4804967731.

It can be written as a sum of positive squares in 12 ways, for example, as 44382244 + 13732558596 = 6662^2 + 117186^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 339054 + ... + 377506.

Almost surely, 2^13776940840 is an apocalyptic number.

13776940840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13776940840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17100109260).

13776940840 is an abundant number, since it is smaller than the sum of its proper divisors (20423277680).

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

13776940840 is a wasteful number, since it uses less digits than its factorization.

13776940840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38543 (or 38526 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 13776940840 in words is "thirteen billion, seven hundred seventy-six million, nine hundred forty thousand, eight hundred forty".