191193648392 has 8 divisors (see below), whose sum is σ = 358488090750. Its totient is φ = 95596824192.

The previous prime is 191193648391. The next prime is 191193648407. The reversal of 191193648392 is 293846391191.

It can be written as a sum of positive squares in only one way, i.e., 185600702596 + 5592945796 = 430814^2 + 74786^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×191193648392² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (191193648391) by changing a digit.

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 as a sum of consecutive naturals, namely, 11949603017 + ... + 11949603032.

Almost surely, 2^191193648392 is an apocalyptic number.

It is an amenable number.

191193648392 is a deficient number, since it is larger than the sum of its proper divisors (167294442358).

191193648392 is a wasteful number, since it uses less digits than its factorization.

191193648392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23899206055 (or 23899206051 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 56.

The spelling of 191193648392 in words is "one hundred ninety-one billion, one hundred ninety-three million, six hundred forty-eight thousand, three hundred ninety-two".