159168994 has 32 divisors (see below), whose sum is σ = 264092400. Its totient is φ = 71608320.

The previous prime is 159168979. The next prime is 159169033. The reversal of 159168994 is 499861951.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 114211969 + 44957025 = 10687^2 + 6705^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106734 + ... + 108214.

Almost surely, 2^159168994 is an apocalyptic number.

159168994 is a deficient number, since it is larger than the sum of its proper divisors (104923406).

159168994 is a wasteful number, since it uses less digits than its factorization.

159168994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638.

The product of its digits is 699840, while the sum is 52.

The square root of 159168994 is about 12616.2194812868. The cubic root of 159168994 is about 541.9420175534.

The spelling of 159168994 in words is "one hundred fifty-nine million, one hundred sixty-eight thousand, nine hundred ninety-four".