190945043569 has 4 divisors (see below), whose sum is σ = 218222906944. Its totient is φ = 163667180196.

The previous prime is 190945043557. The next prime is 190945043593. The reversal of 190945043569 is 965340549091.

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: 965340549091 = 163 ⋅5922334657.

It is a cyclic number.

It is not a de Polignac number, because 190945043569 - 2¹³ = 190945035377 is a prime.

It is a super-2 number, since 2×190945043569² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (190945043599) 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, 13638931677 + ... + 13638931690.

It is an arithmetic number, because the mean of its divisors is an integer number (54555726736).

Almost surely, 2^190945043569 is an apocalyptic number.

It is an amenable number.

190945043569 is a deficient number, since it is larger than the sum of its proper divisors (27277863375).

190945043569 is an equidigital number, since it uses as much as digits as its factorization.

190945043569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27277863374.

The product of its (nonzero) digits is 5248800, while the sum is 55.

The spelling of 190945043569 in words is "one hundred ninety billion, nine hundred forty-five million, forty-three thousand, five hundred sixty-nine".