13869394776 has 80 divisors (see below), whose sum is σ = 39072013200. Its totient is φ = 4596371136.

The previous prime is 13869394771. The next prime is 13869394787. The reversal of 13869394776 is 67749396831.

It is a super-2 number, since 2×13869394776² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13869394771) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 50245 + ... + 173963.

It is an arithmetic number, because the mean of its divisors is an integer number (488400165).

Almost surely, 2^13869394776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13869394776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19536006600).

13869394776 is an abundant number, since it is smaller than the sum of its proper divisors (25202618424).

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

13869394776 is a wasteful number, since it uses less digits than its factorization.

13869394776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123910 (or 123897 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 63.

The spelling of 13869394776 in words is "thirteen billion, eight hundred sixty-nine million, three hundred ninety-four thousand, seven hundred seventy-six".