159721478 has 24 divisors (see below), whose sum is σ = 279802512. Its totient is φ = 68180784.

The previous prime is 159721469. The next prime is 159721481. The reversal of 159721478 is 874127951.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22676 + ... + 28872.

It is an arithmetic number, because the mean of its divisors is an integer number (11658438).

Almost surely, 2^159721478 is an apocalyptic number.

159721478 is a deficient number, since it is larger than the sum of its proper divisors (120081034).

159721478 is a wasteful number, since it uses less digits than its factorization.

159721478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6476 (or 6469 counting only the distinct ones).

The product of its digits is 141120, while the sum is 44.

The square root of 159721478 is about 12638.0962965155. The cubic root of 159721478 is about 542.5683299295.

The spelling of 159721478 in words is "one hundred fifty-nine million, seven hundred twenty-one thousand, four hundred seventy-eight".