159621406 has 16 divisors (see below), whose sum is σ = 274847616. Its totient is φ = 68106456.

The previous prime is 159621389. The next prime is 159621433. The reversal of 159621406 is 604126951.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21936 + ... + 28291.

It is an arithmetic number, because the mean of its divisors is an integer number (17177976).

Almost surely, 2^159621406 is an apocalyptic number.

159621406 is a deficient number, since it is larger than the sum of its proper divisors (115226210).

159621406 is a wasteful number, since it uses less digits than its factorization.

159621406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50463.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 159621406 is about 12634.1365355928. The cubic root of 159621406 is about 542.4549925498.

The spelling of 159621406 in words is "one hundred fifty-nine million, six hundred twenty-one thousand, four hundred six".