195711090145 has 4 divisors (see below), whose sum is σ = 234853308180. Its totient is φ = 156568872112.

The previous prime is 195711090137. The next prime is 195711090193. The reversal of 195711090145 is 541090117591.

195711090145 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.

It can be written as a sum of positive squares in 2 ways, for example, as 106630330849 + 89080759296 = 326543^2 + 298464^2 .

It is a cyclic number.

It is not a de Polignac number, because 195711090145 - 2³ = 195711090137 is a prime.

It is a super-2 number, since 2×195711090145² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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, 19571109010 + ... + 19571109019.

It is an arithmetic number, because the mean of its divisors is an integer number (58713327045).

Almost surely, 2^195711090145 is an apocalyptic number.

It is an amenable number.

195711090145 is a deficient number, since it is larger than the sum of its proper divisors (39142218035).

195711090145 is an equidigital number, since it uses as much as digits as its factorization.

195711090145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39142218034.

The product of its (nonzero) digits is 56700, while the sum is 43.

The spelling of 195711090145 in words is "one hundred ninety-five billion, seven hundred eleven million, ninety thousand, one hundred forty-five".