191696856380 has 24 divisors (see below), whose sum is σ = 402574432848. Its totient is φ = 76676640768.

The previous prime is 191696856331. The next prime is 191696856431. The reversal of 191696856380 is 83658696191.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 766067 + ... + 985013.

It is an arithmetic number, because the mean of its divisors is an integer number (16773934702).

Almost surely, 2^191696856380 is an apocalyptic number.

191696856380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191696856380 is an abundant number, since it is smaller than the sum of its proper divisors (210877576468).

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

191696856380 is a wasteful number, since it uses less digits than its factorization.

191696856380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262733 (or 262731 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 62.

The spelling of 191696856380 in words is "one hundred ninety-one billion, six hundred ninety-six million, eight hundred fifty-six thousand, three hundred eighty".