1158009109621 has 12 divisors (see below), whose sum is σ = 1433072982432. Its totient is φ = 916226986896.

The previous prime is 1158009109619. The next prime is 1158009109667. The reversal of 1158009109621 is 1269019008511.

It is not a de Polignac number, because 1158009109621 - 2¹ = 1158009109619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158009109121) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 489436311 + ... + 489438676.

It is an arithmetic number, because the mean of its divisors is an integer number (119422748536).

Almost surely, 2^{1158009109621} is an apocalyptic number.

It is an amenable number.

1158009109621 is a deficient number, since it is larger than the sum of its proper divisors (275063872811).

1158009109621 is an equidigital number, since it uses as much as digits as its factorization.

1158009109621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978875020 (or 978875007 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 43.

The spelling of 1158009109621 in words is "one trillion, one hundred fifty-eight billion, nine million, one hundred nine thousand, six hundred twenty-one".