1158812721364 has 12 divisors (see below), whose sum is σ = 2055702019924. Its totient is φ = 571469287104.

The previous prime is 1158812721361. The next prime is 1158812721371. The reversal of 1158812721364 is 4631272188511.

It can be written as a sum of positive squares in 2 ways, for example, as 1009337696964 + 149475024400 = 1004658^2 + 386620^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158812721361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1984268067 + ... + 1984268650.

Almost surely, 2^{1158812721364} is an apocalyptic number.

It is an amenable number.

1158812721364 is a deficient number, since it is larger than the sum of its proper divisors (896889298560).

1158812721364 is a wasteful number, since it uses less digits than its factorization.

1158812721364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3968536794 (or 3968536792 counting only the distinct ones).

The product of its digits is 645120, while the sum is 49.

The spelling of 1158812721364 in words is "one trillion, one hundred fifty-eight billion, eight hundred twelve million, seven hundred twenty-one thousand, three hundred sixty-four".