191099648 has 18 divisors (see below), whose sum is σ = 381453324. Its totient is φ = 95549696.

The previous prime is 191099599. The next prime is 191099651. The reversal of 191099648 is 846990191.

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 as a sum of consecutive naturals, namely, 372986 + ... + 373497.

Almost surely, 2^191099648 is an apocalyptic number.

It is an amenable number.

191099648 is a deficient number, since it is larger than the sum of its proper divisors (190353676).

191099648 is an frugal number, since it uses more digits than its factorization.

191099648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746499 (or 746485 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 191099648 is about 13823.8796291056. The cubic root of 191099648 is about 575.9966563592.

The spelling of 191099648 in words is "one hundred ninety-one million, ninety-nine thousand, six hundred forty-eight".