190605259657 has 4 divisors (see below), whose sum is σ = 190624602640. Its totient is φ = 190585916676.

The previous prime is 190605259643. The next prime is 190605259661. The reversal of 190605259657 is 756952506091.

190605259657 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: 756952506091 = 3917 ⋅193248023.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190605259657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 190605259598 and 190605259607.

It is not an unprimeable number, because it can be changed into a prime (190605259697) 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, 9656703 + ... + 9676420.

It is an arithmetic number, because the mean of its divisors is an integer number (47656150660).

Almost surely, 2^190605259657 is an apocalyptic number.

It is an amenable number.

190605259657 is a deficient number, since it is larger than the sum of its proper divisors (19342983).

190605259657 is an equidigital number, since it uses as much as digits as its factorization.

190605259657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19342982.

The product of its (nonzero) digits is 5103000, while the sum is 55.

The spelling of 190605259657 in words is "one hundred ninety billion, six hundred five million, two hundred fifty-nine thousand, six hundred fifty-seven".