1173043596545 has 4 divisors (see below), whose sum is σ = 1407652315860. Its totient is φ = 938434877232.

The previous prime is 1173043596541. The next prime is 1173043596581. The reversal of 1173043596545 is 5456953403711.

It is a happy number.

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 804478043329 + 368565553216 = 896927^2 + 607096^2 .

It is a cyclic number.

It is not a de Polignac number, because 1173043596545 - 2² = 1173043596541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1173043596541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117304359650 + ... + 117304359659.

It is an arithmetic number, because the mean of its divisors is an integer number (351913078965).

Almost surely, 2^{1173043596545} is an apocalyptic number.

It is an amenable number.

1173043596545 is a deficient number, since it is larger than the sum of its proper divisors (234608719315).

1173043596545 is an equidigital number, since it uses as much as digits as its factorization.

1173043596545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234608719314.

The product of its (nonzero) digits is 6804000, while the sum is 53.

The spelling of 1173043596545 in words is "one trillion, one hundred seventy-three billion, forty-three million, five hundred ninety-six thousand, five hundred forty-five".