1158238811649 has 4 divisors (see below), whose sum is σ = 1544318415536. Its totient is φ = 772159207764.

The previous prime is 1158238811621. The next prime is 1158238811663. The reversal of 1158238811649 is 9461188328511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1158238811649 - 2³⁹ = 608482997761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1158238801649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193039801939 + ... + 193039801944.

It is an arithmetic number, because the mean of its divisors is an integer number (386079603884).

Almost surely, 2^{1158238811649} is an apocalyptic number.

It is an amenable number.

1158238811649 is a deficient number, since it is larger than the sum of its proper divisors (386079603887).

1158238811649 is an equidigital number, since it uses as much as digits as its factorization.

1158238811649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386079603886.

The product of its digits is 3317760, while the sum is 57.

The spelling of 1158238811649 in words is "one trillion, one hundred fifty-eight billion, two hundred thirty-eight million, eight hundred eleven thousand, six hundred forty-nine".