190387342840405 has 4 divisors (see below), whose sum is σ = 228464811408492. Its totient is φ = 152309874272320.

The previous prime is 190387342840403. The next prime is 190387342840459. The reversal of 190387342840405 is 504048243783091.

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 45990613963044 + 144396728877361 = 6781638^2 + 12016519^2 .

It is not a de Polignac number, because 190387342840405 - 2¹ = 190387342840403 is a prime.

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 190387342840405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190387342840403) 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, 19038734284036 + ... + 19038734284045.

It is an arithmetic number, because the mean of its divisors is an integer number (57116202852123).

Almost surely, 2^{190387342840405} is an apocalyptic number.

It is an amenable number.

190387342840405 is a deficient number, since it is larger than the sum of its proper divisors (38077468568087).

190387342840405 is an equidigital number, since it uses as much as digits as its factorization.

190387342840405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38077468568086.

The product of its (nonzero) digits is 23224320, while the sum is 58.

The spelling of 190387342840405 in words is "one hundred ninety trillion, three hundred eighty-seven billion, three hundred forty-two million, eight hundred forty thousand, four hundred five".