1172844173956 has 48 divisors (see below), whose sum is σ = 2594399616256. Its totient is φ = 451442242944.

The previous prime is 1172844173953. The next prime is 1172844173981. The reversal of 1172844173956 is 6593714482711.

It is a self number, because there is not a number n which added to its sum of digits gives 1172844173956.

It is not an unprimeable number, because it can be changed into a prime (1172844173953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43528416 + ... + 43555351.

Almost surely, 2^{1172844173956} is an apocalyptic number.

It is an amenable number.

1172844173956 is an abundant number, since it is smaller than the sum of its proper divisors (1421555442300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1172844173956 is a wasteful number, since it uses less digits than its factorization.

1172844173956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87083828 (or 87083826 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 58.

The spelling of 1172844173956 in words is "one trillion, one hundred seventy-two billion, eight hundred forty-four million, one hundred seventy-three thousand, nine hundred fifty-six".