1158530961687 has 24 divisors (see below), whose sum is σ = 1787265406080. Its totient is φ = 665185237200.

The previous prime is 1158530961661. The next prime is 1158530961689. The reversal of 1158530961687 is 7861690358511.

It is a happy number.

It is not a de Polignac number, because 1158530961687 - 2⁸ = 1158530961431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1158530961687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158530961689) 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, 83981139 + ... + 83994932.

It is an arithmetic number, because the mean of its divisors is an integer number (74469391920).

Almost surely, 2^{1158530961687} is an apocalyptic number.

1158530961687 is a deficient number, since it is larger than the sum of its proper divisors (628734444393).

1158530961687 is a wasteful number, since it uses less digits than its factorization.

1158530961687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167976115 (or 167976104 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 60.

The spelling of 1158530961687 in words is "one trillion, one hundred fifty-eight billion, five hundred thirty million, nine hundred sixty-one thousand, six hundred eighty-seven".