1158513682781 has 24 divisors (see below), whose sum is σ = 1518032574144. Its totient is φ = 862707006720.

The previous prime is 1158513682757. The next prime is 1158513682873. The reversal of 1158513682781 is 1872863158511.

It is not a de Polignac number, because 1158513682781 - 2⁶ = 1158513682717 is a prime.

It is a super-2 number, since 2×1158513682781² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158513682481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28782875 + ... + 28823096.

It is an arithmetic number, because the mean of its divisors is an integer number (63251357256).

Almost surely, 2^{1158513682781} is an apocalyptic number.

It is an amenable number.

1158513682781 is a deficient number, since it is larger than the sum of its proper divisors (359518891363).

1158513682781 is a wasteful number, since it uses less digits than its factorization.

1158513682781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57606021 (or 57606008 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 56.

The spelling of 1158513682781 in words is "one trillion, one hundred fifty-eight billion, five hundred thirteen million, six hundred eighty-two thousand, seven hundred eighty-one".