158961585 has 8 divisors (see below), whose sum is σ = 254338560. Its totient is φ = 84779504.

The previous prime is 158961571. The next prime is 158961589. The reversal of 158961585 is 585169851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 158961585 - 2⁸ = 158961329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158961589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5298705 + ... + 5298734.

It is an arithmetic number, because the mean of its divisors is an integer number (31792320).

Almost surely, 2^158961585 is an apocalyptic number.

158961585 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

158961585 is a deficient number, since it is larger than the sum of its proper divisors (95376975).

158961585 is a wasteful number, since it uses less digits than its factorization.

158961585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10597447.

The product of its digits is 432000, while the sum is 48.

The square root of 158961585 is about 12607.9968670681. The cubic root of 158961585 is about 541.7065183566.

The spelling of 158961585 in words is "one hundred fifty-eight million, nine hundred sixty-one thousand, five hundred eighty-five".