191571836946 has 32 divisors (see below), whose sum is σ = 456916681728. Its totient is φ = 52355035920.

The previous prime is 191571836903. The next prime is 191571836971. The reversal of 191571836946 is 649638175191.

It is a self number, because there is not a number n which added to its sum of digits gives 191571836946.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99156300 + ... + 99158231.

It is an arithmetic number, because the mean of its divisors is an integer number (14278646304).

Almost surely, 2^191571836946 is an apocalyptic number.

191571836946 is an abundant number, since it is smaller than the sum of its proper divisors (265344844782).

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

191571836946 is a wasteful number, since it uses less digits than its factorization.

191571836946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198314566.

The product of its digits is 9797760, while the sum is 60.

The spelling of 191571836946 in words is "one hundred ninety-one billion, five hundred seventy-one million, eight hundred thirty-six thousand, nine hundred forty-six".