1158812721366 has 64 divisors (see below), whose sum is σ = 2468011094208. Its totient is φ = 361469308928.

The previous prime is 1158812721361. The next prime is 1158812721371. The reversal of 1158812721366 is 6631272188511.

It is an interprime number because it is at equal distance from previous prime (1158812721361) and next prime (1158812721371).

It is a Harshad number since it is a multiple of its sum of digits (51).

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 31 ways as a sum of consecutive naturals, for example, 32393746 + ... + 32429498.

It is an arithmetic number, because the mean of its divisors is an integer number (38562673347).

Almost surely, 2^{1158812721366} is an apocalyptic number.

1158812721366 is an abundant number, since it is smaller than the sum of its proper divisors (1309198372842).

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

1158812721366 is a wasteful number, since it uses less digits than its factorization.

1158812721366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37585.

The product of its digits is 967680, while the sum is 51.

The spelling of 1158812721366 in words is "one trillion, one hundred fifty-eight billion, eight hundred twelve million, seven hundred twenty-one thousand, three hundred sixty-six".