1164643566500 has 48 divisors (see below), whose sum is σ = 2543994900720. Its totient is φ = 465781721600.

The previous prime is 1164643566481. The next prime is 1164643566511. The reversal of 1164643566500 is 56653464611.

It can be written as a sum of positive squares in 8 ways, for example, as 13520573284 + 1151122993216 = 116278^2 + 1072904^2 .

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2942366 + ... + 3314634.

It is an arithmetic number, because the mean of its divisors is an integer number (52999893765).

Almost surely, 2^{1164643566500} is an apocalyptic number.

1164643566500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1164643566500 is an abundant number, since it is smaller than the sum of its proper divisors (1379351334220).

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

1164643566500 is a wasteful number, since it uses less digits than its factorization.

1164643566500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378545 (or 378533 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 1164643566500 in words is "one trillion, one hundred sixty-four billion, six hundred forty-three million, five hundred sixty-six thousand, five hundred".