158816961 has 12 divisors (see below), whose sum is σ = 230865492. Its totient is φ = 105202656.

The previous prime is 158816947. The next prime is 158816969. The reversal of 158816961 is 169618851.

158816961 is a `hidden beast` number, since 1 + 588 + 1 + 6 + 9 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 110250000 + 48566961 = 10500^2 + 6969^2 .

It is not a de Polignac number, because 158816961 - 2⁶ = 158816897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158816969) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54786 + ... + 57611.

It is an arithmetic number, because the mean of its divisors is an integer number (19238791).

Almost surely, 2^158816961 is an apocalyptic number.

It is an amenable number.

158816961 is a deficient number, since it is larger than the sum of its proper divisors (72048531).

158816961 is a wasteful number, since it uses less digits than its factorization.

158816961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112560 (or 112557 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 158816961 is about 12602.2601544326. The cubic root of 158816961 is about 541.5421861277.

The spelling of 158816961 in words is "one hundred fifty-eight million, eight hundred sixteen thousand, nine hundred sixty-one".