156441985 has 16 divisors (see below), whose sum is σ = 217754496. Its totient is φ = 105671808.

The previous prime is 156441983. The next prime is 156442049. The reversal of 156441985 is 589144651.

It is a cyclic number.

It is not a de Polignac number, because 156441985 - 2¹ = 156441983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156441983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31012 + ... + 35701.

It is an arithmetic number, because the mean of its divisors is an integer number (13609656).

Almost surely, 2^156441985 is an apocalyptic number.

It is an amenable number.

156441985 is a deficient number, since it is larger than the sum of its proper divisors (61312511).

156441985 is an equidigital number, since it uses as much as digits as its factorization.

156441985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66792.

The product of its digits is 172800, while the sum is 43.

The square root of 156441985 is about 12507.6770425207. The cubic root of 156441985 is about 538.8291790970.

The spelling of 156441985 in words is "one hundred fifty-six million, four hundred forty-one thousand, nine hundred eighty-five".