191878306752 has 112 divisors (see below), whose sum is σ = 553985655552. Its totient is φ = 58128660480.

The previous prime is 191878306733. The next prime is 191878306801. The reversal of 191878306752 is 257603878191.

It is a happy number.

191878306752 is digitally balanced in base 2, 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 = 191878306692 and 191878306701.

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 15 ways as a sum of consecutive naturals, for example, 9064693 + ... + 9085835.

It is an arithmetic number, because the mean of its divisors is an integer number (4946300496).

Almost surely, 2^191878306752 is an apocalyptic number.

191878306752 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 191878306752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276992827776).

191878306752 is an abundant number, since it is smaller than the sum of its proper divisors (362107348800).

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

191878306752 is a wasteful number, since it uses less digits than its factorization.

191878306752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25466 (or 25456 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 57.

The spelling of 191878306752 in words is "one hundred ninety-one billion, eight hundred seventy-eight million, three hundred six thousand, seven hundred fifty-two".