1158811343361 has 75 divisors (see below), whose sum is σ = 2020281984083. Its totient is φ = 661906637280.

The previous prime is 1158811343353. The next prime is 1158811343377. The reversal of 1158811343361 is 1633431188511.

The square root of 1158811343361 is 1076481.

It is a perfect power (a square), and thus also a powerful number.

1158811343361 is a `hidden beast` number, since 1 + 1 + 588 + 1 + 1 + 3 + 4 + 3 + 3 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 112036808961 + 1046774534400 = 334719^2 + 1023120^2 .

It is not a de Polignac number, because 1158811343361 - 2³ = 1158811343353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1158811343561) by changing a digit.

It is a polite number, since it can be written in 74 ways as a sum of consecutive naturals, for example, 474726901 + ... + 474729341.

Almost surely, 2^{1158811343361} is an apocalyptic number.

1158811343361 is the 1076481-st square number.

1158811343361 is the 538241-st centered octagonal number.

It is an amenable number.

1158811343361 is a deficient number, since it is larger than the sum of its proper divisors (861470640722).

1158811343361 is an frugal number, since it uses more digits than its factorization.

1158811343361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4922 (or 2451 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The spelling of 1158811343361 in words is "one trillion, one hundred fifty-eight billion, eight hundred eleven million, three hundred forty-three thousand, three hundred sixty-one".