158689104989 has 4 divisors (see below), whose sum is σ = 158690191680. Its totient is φ = 158688018300.

The previous prime is 158689104979. The next prime is 158689105009. The reversal of 158689104989 is 989401986851.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 989401986851 = 97 ⋅10200020483.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158689104989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158689104949) 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, 282587 + ... + 630264.

It is an arithmetic number, because the mean of its divisors is an integer number (39672547920).

Almost surely, 2^158689104989 is an apocalyptic number.

It is an amenable number.

158689104989 is a deficient number, since it is larger than the sum of its proper divisors (1086691).

158689104989 is an equidigital number, since it uses as much as digits as its factorization.

158689104989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086690.

The product of its (nonzero) digits is 44789760, while the sum is 68.

The spelling of 158689104989 in words is "one hundred fifty-eight billion, six hundred eighty-nine million, one hundred four thousand, nine hundred eighty-nine".