158999766156 has 240 divisors, whose sum is σ = 529251351552. Its totient is φ = 40419648000.

The previous prime is 158999766151. The next prime is 158999766187. The reversal of 158999766156 is 651667999851.

It is not an unprimeable number, because it can be changed into a prime (158999766151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1104756 + ... + 1240356.

Almost surely, 2^158999766156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158999766156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264625675776).

158999766156 is an abundant number, since it is smaller than the sum of its proper divisors (370251585396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

158999766156 is a wasteful number, since it uses less digits than its factorization.

158999766156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135682 (or 135671 counting only the distinct ones).

The product of its digits is 220449600, while the sum is 72.

The spelling of 158999766156 in words is "one hundred fifty-eight billion, nine hundred ninety-nine million, seven hundred sixty-six thousand, one hundred fifty-six".