190042775257 has 4 divisors (see below), whose sum is σ = 198305504640. Its totient is φ = 181780045876.

The previous prime is 190042775227. The next prime is 190042775323. The reversal of 190042775257 is 752577240091.

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: 752577240091 = 20693 ⋅36368687.

It is a cyclic number.

It is not a de Polignac number, because 190042775257 - 2⁷ = 190042775129 is a prime.

It is a super-2 number, since 2×190042775257² (a number of 23 digits) contains 22 as substring.

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 190042775257.

It is not an unprimeable number, because it can be changed into a prime (190042775227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4131364657 + ... + 4131364702.

It is an arithmetic number, because the mean of its divisors is an integer number (49576376160).

Almost surely, 2^190042775257 is an apocalyptic number.

It is an amenable number.

190042775257 is a deficient number, since it is larger than the sum of its proper divisors (8262729383).

190042775257 is an equidigital number, since it uses as much as digits as its factorization.

190042775257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8262729382.

The product of its (nonzero) digits is 1234800, while the sum is 49.

The spelling of 190042775257 in words is "one hundred ninety billion, forty-two million, seven hundred seventy-five thousand, two hundred fifty-seven".