191648053085 has 4 divisors (see below), whose sum is σ = 229977663708. Its totient is φ = 153318442464.

The previous prime is 191648053049. The next prime is 191648053087. The reversal of 191648053085 is 580350846191.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 124593468484 + 67054584601 = 352978^2 + 258949^2 .

It is a cyclic number.

It is not a de Polignac number, because 191648053085 - 2²⁰ = 191647004509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191648053087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19164805304 + ... + 19164805313.

It is an arithmetic number, because the mean of its divisors is an integer number (57494415927).

Almost surely, 2^191648053085 is an apocalyptic number.

It is an amenable number.

191648053085 is a deficient number, since it is larger than the sum of its proper divisors (38329610623).

191648053085 is an equidigital number, since it uses as much as digits as its factorization.

191648053085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38329610622.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 191648053085 in words is "one hundred ninety-one billion, six hundred forty-eight million, fifty-three thousand, eighty-five".