1158812721342 has 12 divisors (see below), whose sum is σ = 2510760896280. Its totient is φ = 386270907108.

The previous prime is 1158812721301. The next prime is 1158812721361. The reversal of 1158812721342 is 2431272188511.

1158812721342 is a `hidden beast` number, since 1 + 1 + 588 + 1 + 2 + 7 + 21 + 3 + 42 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32189242242 + ... + 32189242277.

It is an arithmetic number, because the mean of its divisors is an integer number (209230074690).

Almost surely, 2^{1158812721342} is an apocalyptic number.

1158812721342 is an abundant number, since it is smaller than the sum of its proper divisors (1351948174938).

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

1158812721342 is a wasteful number, since it uses less digits than its factorization.

1158812721342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64378484527 (or 64378484524 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The spelling of 1158812721342 in words is "one trillion, one hundred fifty-eight billion, eight hundred twelve million, seven hundred twenty-one thousand, three hundred forty-two".