191861740032 has 320 divisors, whose sum is σ = 544465152000. Its totient is φ = 59914027008.

The previous prime is 191861740013. The next prime is 191861740039. The reversal of 191861740032 is 230047168191.

It is a happy number.

It is a super-2 number, since 2×191861740032² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (191861740039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 437042469 + ... + 437042907.

It is an arithmetic number, because the mean of its divisors is an integer number (1701453600).

Almost surely, 2^191861740032 is an apocalyptic number.

191861740032 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 191861740032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272232576000).

191861740032 is an abundant number, since it is smaller than the sum of its proper divisors (352603411968).

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

191861740032 is a wasteful number, since it uses less digits than its factorization.

191861740032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711 (or 695 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 191861740032 in words is "one hundred ninety-one billion, eight hundred sixty-one million, seven hundred forty thousand, thirty-two".