19198421079552 has 2240 divisors, whose sum is σ = 71700582868992. Its totient is φ = 5052284928000.

The previous prime is 19198421079463. The next prime is 19198421079553. The reversal of 19198421079552 is 25597012489191.

19198421079552 is a `hidden beast` number, since 1 + 9 + 1 + 9 + 8 + 4 + 2 + 1 + 0 + 79 + 552 = 666.

It is a super-2 number, since 2×19198421079552² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19198421079552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19198421079553) by changing a digit.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 67838943603 + ... + 67838943885.

Almost surely, 2^{19198421079552} is an apocalyptic number.

19198421079552 is a gapful number since it is divisible by the number (12) 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 19198421079552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35850291434496).

19198421079552 is an abundant number, since it is smaller than the sum of its proper divisors (52502161789440).

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

19198421079552 is a wasteful number, since it uses less digits than its factorization.

19198421079552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 16329600, while the sum is 63.

The spelling of 19198421079552 in words is "nineteen trillion, one hundred ninety-eight billion, four hundred twenty-one million, seventy-nine thousand, five hundred fifty-two".