13863215778 has 8 divisors (see below), whose sum is σ = 27726431568. Its totient is φ = 4621071924.

The previous prime is 13863215771. The next prime is 13863215789. The reversal of 13863215778 is 87751236831.

It is a sphenic number, since it is the product of 3 distinct primes.

13863215778 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 13863215778.

It is not an unprimeable number, because it can be changed into a prime (13863215771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1155267976 + ... + 1155267987.

It is an arithmetic number, because the mean of its divisors is an integer number (3465803946).

Almost surely, 2^13863215778 is an apocalyptic number.

13863215778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

13863215778 is a wasteful number, since it uses less digits than its factorization.

13863215778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310535968.

The product of its digits is 1693440, while the sum is 51.

The spelling of 13863215778 in words is "thirteen billion, eight hundred sixty-three million, two hundred fifteen thousand, seven hundred seventy-eight".