19682178657648 has 80 divisors (see below), whose sum is σ = 55174821668736. Its totient is φ = 6009825519360.

The previous prime is 19682178657641. The next prime is 19682178657677. The reversal of 19682178657648 is 84675687128691.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19682178657641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120307390 + ... + 120470877.

Almost surely, 2^{19682178657648} is an apocalyptic number.

It is an amenable number.

19682178657648 is an abundant number, since it is smaller than the sum of its proper divisors (35492643011088).

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

19682178657648 is a wasteful number, since it uses less digits than its factorization.

19682178657648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240778422 (or 240778416 counting only the distinct ones).

The product of its digits is 1950842880, while the sum is 78.

The spelling of 19682178657648 in words is "nineteen trillion, six hundred eighty-two billion, one hundred seventy-eight million, six hundred fifty-seven thousand, six hundred forty-eight".