191192143640 has 32 divisors (see below), whose sum is σ = 430432148880. Its totient is φ = 76432444032.

The previous prime is 191192143633. The next prime is 191192143663. The reversal of 191192143640 is 46341291191.

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, 1318139 + ... + 1455978.

Almost surely, 2^191192143640 is an apocalyptic number.

191192143640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191192143640 is an abundant number, since it is smaller than the sum of its proper divisors (239240005240).

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

191192143640 is a wasteful number, since it uses less digits than its factorization.

191192143640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2775851 (or 2775847 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The spelling of 191192143640 in words is "one hundred ninety-one billion, one hundred ninety-two million, one hundred forty-three thousand, six hundred forty".