191953656 has 48 divisors (see below), whose sum is σ = 547240200. Its totient is φ = 60616512.

The previous prime is 191953627. The next prime is 191953673. The reversal of 191953656 is 656359191.

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 11 ways as a sum of consecutive naturals, for example, 68791 + ... + 71526.

Almost surely, 2^191953656 is an apocalyptic number.

It is an amenable number.

191953656 is an abundant number, since it is smaller than the sum of its proper divisors (355286544).

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

191953656 is a wasteful number, since it uses less digits than its factorization.

191953656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140348 (or 140341 counting only the distinct ones).

The product of its digits is 218700, while the sum is 45.

The square root of 191953656 is about 13854.7340645716. The cubic root of 191953656 is about 576.8534079892.

The spelling of 191953656 in words is "one hundred ninety-one million, nine hundred fifty-three thousand, six hundred fifty-six".