13733042778 has 160 divisors (see below), whose sum is σ = 37952538624. Its totient is φ = 3614347008.

The previous prime is 13733042747. The next prime is 13733042797. The reversal of 13733042778 is 87724033731.

13733042778 is a `hidden beast` number, since 1 + 3 + 73 + 304 + 277 + 8 = 666.

13733042778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 12633351 + ... + 12634437.

Almost surely, 2^13733042778 is an apocalyptic number.

13733042778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13733042778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18976269312).

13733042778 is an abundant number, since it is smaller than the sum of its proper divisors (24219495846).

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

13733042778 is a wasteful number, since it uses less digits than its factorization.

13733042778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1978 (or 1969 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 45.

The spelling of 13733042778 in words is "thirteen billion, seven hundred thirty-three million, forty-two thousand, seven hundred seventy-eight".