16308778648 has 16 divisors (see below), whose sum is σ = 30608634960. Its totient is φ = 8146476000.

The previous prime is 16308778639. The next prime is 16308778697. The reversal of 16308778648 is 84687780361.

It is a junction number, because it is equal to n+sod(n) for n = 16308778592 and 16308778601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 980403 + ... + 996898.

It is an arithmetic number, because the mean of its divisors is an integer number (1913039685).

Almost surely, 2^16308778648 is an apocalyptic number.

It is an amenable number.

16308778648 is a deficient number, since it is larger than the sum of its proper divisors (14299856312).

16308778648 is a wasteful number, since it uses less digits than its factorization.

16308778648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1978338 (or 1978334 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 58.

The spelling of 16308778648 in words is "sixteen billion, three hundred eight million, seven hundred seventy-eight thousand, six hundred forty-eight".