16308640778 has 8 divisors (see below), whose sum is σ = 24463888320. Its totient is φ = 8154011340.

The previous prime is 16308640763. The next prime is 16308640811. The reversal of 16308640778 is 87704680361.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81698 + ... + 198221.

It is an arithmetic number, because the mean of its divisors is an integer number (3057986040).

Almost surely, 2^16308640778 is an apocalyptic number.

16308640778 is a deficient number, since it is larger than the sum of its proper divisors (8155247542).

16308640778 is a wasteful number, since it uses less digits than its factorization.

16308640778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309052.

The product of its (nonzero) digits is 1354752, while the sum is 50.

The spelling of 16308640778 in words is "sixteen billion, three hundred eight million, six hundred forty thousand, seven hundred seventy-eight".