1172663797644 has 36 divisors (see below), whose sum is σ = 3033169155016. Its totient is φ = 381797515008.

The previous prime is 1172663797637. The next prime is 1172663797667. The reversal of 1172663797644 is 4467973662711.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 378765829 + ... + 378768924.

Almost surely, 2^{1172663797644} is an apocalyptic number.

It is an amenable number.

1172663797644 is an abundant number, since it is smaller than the sum of its proper divisors (1860505357372).

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

1172663797644 is a wasteful number, since it uses less digits than its factorization.

1172663797644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757534806 (or 757534801 counting only the distinct ones).

The product of its digits is 64012032, while the sum is 63.

The spelling of 1172663797644 in words is "one trillion, one hundred seventy-two billion, six hundred sixty-three million, seven hundred ninety-seven thousand, six hundred forty-four".