158591616 has 64 divisors (see below), whose sum is σ = 423161280. Its totient is φ = 52625408.

The previous prime is 158591603. The next prime is 158591659. The reversal of 158591616 is 616195851.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97885 + ... + 99491.

It is an arithmetic number, because the mean of its divisors is an integer number (6611895).

Almost surely, 2^158591616 is an apocalyptic number.

158591616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158591616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211580640).

158591616 is an abundant number, since it is smaller than the sum of its proper divisors (264569664).

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

158591616 is a wasteful number, since it uses less digits than its factorization.

158591616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881 (or 1869 counting only the distinct ones).

The product of its digits is 64800, while the sum is 42.

The square root of 158591616 is about 12593.3163225578. The cubic root of 158591616 is about 541.2859339270.

The spelling of 158591616 in words is "one hundred fifty-eight million, five hundred ninety-one thousand, six hundred sixteen".