191998265519088 has 240 divisors, whose sum is σ = 615170632400896. Its totient is φ = 54760172083200.

The previous prime is 191998265519003. The next prime is 191998265519119. The reversal of 191998265519088 is 880915562899191.

191998265519088 is a `hidden beast` number, since 1 + 9 + 1 + 9 + 98 + 2 + 6 + 5 + 519 + 0 + 8 + 8 = 666.

191998265519088 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 191998265518998 and 191998265519016.

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, 1315857945 + ... + 1316003847.

Almost surely, 2^{191998265519088} is an apocalyptic number.

191998265519088 is a gapful number since it is divisible by the number (18) 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 191998265519088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307585316200448).

191998265519088 is an abundant number, since it is smaller than the sum of its proper divisors (423172366881808).

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

191998265519088 is a wasteful number, since it uses less digits than its factorization.

191998265519088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148212 (or 148203 counting only the distinct ones).

The product of its (nonzero) digits is 1007769600, while the sum is 81.

The spelling of 191998265519088 in words is "one hundred ninety-one trillion, nine hundred ninety-eight billion, two hundred sixty-five million, five hundred nineteen thousand, eighty-eight".