1161572785664 has 160 divisors (see below), whose sum is σ = 2434289258016. Its totient is φ = 553190031360.

The previous prime is 1161572785651. The next prime is 1161572785727. The reversal of 1161572785664 is 4665872751611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189455879 + ... + 189462009.

Almost surely, 2^{1161572785664} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161572785664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1217144629008).

1161572785664 is an abundant number, since it is smaller than the sum of its proper divisors (1272716472352).

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

1161572785664 is an equidigital number, since it uses as much as digits as its factorization.

1161572785664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6396 (or 6380 counting only the distinct ones).

The product of its digits is 16934400, while the sum is 59.

The spelling of 1161572785664 in words is "one trillion, one hundred sixty-one billion, five hundred seventy-two million, seven hundred eighty-five thousand, six hundred sixty-four".