19559294540016 has 320 divisors, whose sum is σ = 66744408084480. Its totient is φ = 4778440519680.

The previous prime is 19559294539979. The next prime is 19559294540021. The reversal of 19559294540016 is 61004549295591.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 99113155 + ... + 99310301.

It is an arithmetic number, because the mean of its divisors is an integer number (208576275264).

Almost surely, 2^{19559294540016} is an apocalyptic number.

19559294540016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19559294540016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33372204042240).

19559294540016 is an abundant number, since it is smaller than the sum of its proper divisors (47185113544464).

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

19559294540016 is a wasteful number, since it uses less digits than its factorization.

19559294540016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198772 (or 198766 counting only the distinct ones).

The product of its (nonzero) digits is 17496000, while the sum is 60.

The spelling of 19559294540016 in words is "nineteen trillion, five hundred fifty-nine billion, two hundred ninety-four million, five hundred forty thousand, sixteen".