16143363778 has 8 divisors (see below), whose sum is σ = 25639460172. Its totient is φ = 7596877056.

The previous prime is 16143363767. The next prime is 16143363779. The reversal of 16143363778 is 87736334161.

It can be written as a sum of positive squares in 2 ways, for example, as 13418210569 + 2725153209 = 115837^2 + 52203^2 .

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

It is not an unprimeable number, because it can be changed into a prime (16143363779) 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, 237402375 + ... + 237402442.

Almost surely, 2^16143363778 is an apocalyptic number.

16143363778 is a deficient number, since it is larger than the sum of its proper divisors (9496096394).

16143363778 is a wasteful number, since it uses less digits than its factorization.

16143363778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474804836.

The product of its digits is 1524096, while the sum is 49.

The spelling of 16143363778 in words is "sixteen billion, one hundred forty-three million, three hundred sixty-three thousand, seven hundred seventy-eight".