1163643215544 has 96 divisors (see below), whose sum is σ = 3314289363840. Its totient is φ = 382417912800.

The previous prime is 1163643215513. The next prime is 1163643215549. The reversal of 1163643215544 is 4455123463611.

1163643215544 is a `hidden beast` number, since 1 + 1 + 6 + 3 + 64 + 32 + 1 + 554 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1163643215544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1163643215549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4077342 + ... + 4353389.

It is an arithmetic number, because the mean of its divisors is an integer number (34523847540).

Almost surely, 2^{1163643215544} is an apocalyptic number.

It is an amenable number.

1163643215544 is an abundant number, since it is smaller than the sum of its proper divisors (2150646148296).

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

1163643215544 is an equidigital number, since it uses as much as digits as its factorization.

1163643215544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8430823 (or 8430807 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The spelling of 1163643215544 in words is "one trillion, one hundred sixty-three billion, six hundred forty-three million, two hundred fifteen thousand, five hundred forty-four".