191693975753 has 4 divisors (see below), whose sum is σ = 219078829440. Its totient is φ = 164309122068.

The previous prime is 191693975719. The next prime is 191693975797. The reversal of 191693975753 is 357579396191.

191693975753 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 357579396191 = 4789 ⋅74666819.

It is not a de Polignac number, because 191693975753 - 2¹⁸ = 191693713609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 191693975753.

It is not an unprimeable number, because it can be changed into a prime (190693975753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13692426833 + ... + 13692426846.

It is an arithmetic number, because the mean of its divisors is an integer number (54769707360).

Almost surely, 2^191693975753 is an apocalyptic number.

It is an amenable number.

191693975753 is a deficient number, since it is larger than the sum of its proper divisors (27384853687).

191693975753 is an equidigital number, since it uses as much as digits as its factorization.

191693975753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27384853686.

The product of its digits is 48223350, while the sum is 65.

The spelling of 191693975753 in words is "one hundred ninety-one billion, six hundred ninety-three million, nine hundred seventy-five thousand, seven hundred fifty-three".