1195805673841 has 3 divisors (see below), whose sum is σ = 1195806767371. Its totient is φ = 1195804580312.

The previous prime is 1195805673833. The next prime is 1195805673847. The reversal of 1195805673841 is 1483765085911.

The square root of 1195805673841 is 1093529.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 75256400241 + 1120549273600 = 274329^2 + 1058560^2 .

It is not a de Polignac number, because 1195805673841 - 2³ = 1195805673833 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1195805673847) 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 2 ways as a sum of consecutive naturals, for example, 546765 + ... + 1640293.

Almost surely, 2^{1195805673841} is an apocalyptic number.

1195805673841 is the 1093529-th square number.

1195805673841 is the 546765-th centered octagonal number.

It is an amenable number.

1195805673841 is a deficient number, since it is larger than the sum of its proper divisors (1093530).

1195805673841 is an frugal number, since it uses more digits than its factorization.

1195805673841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187058 (or 1093529 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 58.

The spelling of 1195805673841 in words is "one trillion, one hundred ninety-five billion, eight hundred five million, six hundred seventy-three thousand, eight hundred forty-one".