191070684640 has 48 divisors (see below), whose sum is σ = 492441269040. Its totient is φ = 69480248320.

The previous prime is 191070684617. The next prime is 191070684653. The reversal of 191070684640 is 46486070191.

191070684640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 54279685 + ... + 54283204.

It is an arithmetic number, because the mean of its divisors is an integer number (10259193105).

Almost surely, 2^191070684640 is an apocalyptic number.

191070684640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191070684640 is an abundant number, since it is smaller than the sum of its proper divisors (301370584400).

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

191070684640 is a wasteful number, since it uses less digits than its factorization.

191070684640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108562915 (or 108562907 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 191070684640 in words is "one hundred ninety-one billion, seventy million, six hundred eighty-four thousand, six hundred forty".