19768446648 has 48 divisors (see below), whose sum is σ = 54184614120. Its totient is φ = 6510088896.

The previous prime is 19768446641. The next prime is 19768446671. The reversal of 19768446648 is 84664486791.

19768446648 is a `hidden beast` number, since 1 + 97 + 6 + 84 + 466 + 4 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19768446641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1648011 + ... + 1659962.

Almost surely, 2^19768446648 is an apocalyptic number.

19768446648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19768446648 is an abundant number, since it is smaller than the sum of its proper divisors (34416167472).

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

19768446648 is a wasteful number, since it uses less digits than its factorization.

19768446648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3308068 (or 3308061 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 63.

The spelling of 19768446648 in words is "nineteen billion, seven hundred sixty-eight million, four hundred forty-six thousand, six hundred forty-eight".