191159481240 has 768 divisors, whose sum is σ = 779761382400. Its totient is φ = 39543386112.

The previous prime is 191159481229. The next prime is 191159481257. The reversal of 191159481240 is 42184951191.

It is a happy number.

191159481240 is a `hidden beast` number, since 1 + 9 + 1 + 1 + 594 + 8 + 12 + 40 = 666.

191159481240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 622669167 + ... + 622669473.

It is an arithmetic number, because the mean of its divisors is an integer number (1015314300).

Almost surely, 2^191159481240 is an apocalyptic number.

191159481240 is a gapful number since it is divisible by the number (10) 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 191159481240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389880691200).

191159481240 is an abundant number, since it is smaller than the sum of its proper divisors (588601901160).

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

191159481240 is a wasteful number, since it uses less digits than its factorization.

191159481240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The spelling of 191159481240 in words is "one hundred ninety-one billion, one hundred fifty-nine million, four hundred eighty-one thousand, two hundred forty".