159912638 has 4 divisors (see below), whose sum is σ = 239868960. Its totient is φ = 79956318.

The previous prime is 159912589. The next prime is 159912733. The reversal of 159912638 is 836219951.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39978158 + ... + 39978161.

It is an arithmetic number, because the mean of its divisors is an integer number (59967240).

Almost surely, 2^159912638 is an apocalyptic number.

159912638 is a deficient number, since it is larger than the sum of its proper divisors (79956322).

159912638 is an equidigital number, since it uses as much as digits as its factorization.

159912638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79956321.

The product of its digits is 116640, while the sum is 44.

The square root of 159912638 is about 12645.6568828986. The cubic root of 159912638 is about 542.7846982670.

The spelling of 159912638 in words is "one hundred fifty-nine million, nine hundred twelve thousand, six hundred thirty-eight".