159901618 has 8 divisors (see below), whose sum is σ = 243784620. Its totient is φ = 78640080.

The previous prime is 159901607. The next prime is 159901639. The reversal of 159901618 is 816109951.

It can be written as a sum of positive squares in 2 ways, for example, as 159845449 + 56169 = 12643^2 + 237^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 655213 + ... + 655456.

Almost surely, 2^159901618 is an apocalyptic number.

159901618 is a deficient number, since it is larger than the sum of its proper divisors (83883002).

159901618 is a wasteful number, since it uses less digits than its factorization.

159901618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310732.

The product of its (nonzero) digits is 19440, while the sum is 40.

The square root of 159901618 is about 12645.2211526727. The cubic root of 159901618 is about 542.7722297407.

The spelling of 159901618 in words is "one hundred fifty-nine million, nine hundred one thousand, six hundred eighteen".