13778016720 has 160 divisors (see below), whose sum is σ = 46179044352. Its totient is φ = 3378118656.

The previous prime is 13778016709. The next prime is 13778016751. The reversal of 13778016720 is 2761087731.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 793249 + ... + 810431.

Almost surely, 2^13778016720 is an apocalyptic number.

13778016720 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 13778016720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23089522176).

13778016720 is an abundant number, since it is smaller than the sum of its proper divisors (32401027632).

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

13778016720 is a wasteful number, since it uses less digits than its factorization.

13778016720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17469 (or 17463 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 42.

The spelling of 13778016720 in words is "thirteen billion, seven hundred seventy-eight million, sixteen thousand, seven hundred twenty".