19666546159104 has 360 divisors, whose sum is σ = 61570314336960. Its totient is φ = 6040473993216.

The previous prime is 19666546159063. The next prime is 19666546159109. The reversal of 19666546159104 is 40195164566691.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19666546159109) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 443087697 + ... + 443132079.

It is an arithmetic number, because the mean of its divisors is an integer number (171028650936).

Almost surely, 2^{19666546159104} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19666546159104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30785157168480).

19666546159104 is an abundant number, since it is smaller than the sum of its proper divisors (41903768177856).

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

19666546159104 is a wasteful number, since it uses less digits than its factorization.

19666546159104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45002 (or 44970 counting only the distinct ones).

The product of its (nonzero) digits is 41990400, while the sum is 63.

The spelling of 19666546159104 in words is "nineteen trillion, six hundred sixty-six billion, five hundred forty-six million, one hundred fifty-nine thousand, one hundred four".