19455225581568 has 624 divisors, whose sum is σ = 61525098927360. Its totient is φ = 5450386636800.

The previous prime is 19455225581501. The next prime is 19455225581651. The reversal of 19455225581568 is 86518552255491.

It is a junction number, because it is equal to n+sod(n) for n = 19455225581499 and 19455225581508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15830125978 + ... + 15830127206.

Almost surely, 2^{19455225581568} 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 19455225581568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30762549463680).

19455225581568 is an abundant number, since it is smaller than the sum of its proper divisors (42069873345792).

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

19455225581568 is a wasteful number, since it uses less digits than its factorization.

19455225581568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762 (or 1733 counting only the distinct ones).

The product of its digits is 172800000, while the sum is 66.

The spelling of 19455225581568 in words is "nineteen trillion, four hundred fifty-five billion, two hundred twenty-five million, five hundred eighty-one thousand, five hundred sixty-eight".