159491641 has 9 divisors (see below), whose sum is σ = 162646509. Its totient is φ = 156397536.

The previous prime is 159491627. The next prime is 159491659. The reversal of 159491641 is 146194951.

The square root of 159491641 is 12629.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 43283241 + 116208400 = 6579^2 + 10780^2 .

It is not a de Polignac number, because 159491641 - 2⁵ = 159491609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 159491594 and 159491603.

It is not an unprimeable number, because it can be changed into a prime (159491041) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 921831 + ... + 922003.

Almost surely, 2^159491641 is an apocalyptic number.

159491641 is the 12629-th square number.

159491641 is the 6315-th centered octagonal number.

It is an amenable number.

159491641 is a deficient number, since it is larger than the sum of its proper divisors (3154868).

159491641 is an frugal number, since it uses more digits than its factorization.

159491641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 246 counting only the distinct ones).

The product of its digits is 38880, while the sum is 40.

The cubic root of 159491641 is about 542.3079555544.

The spelling of 159491641 in words is "one hundred fifty-nine million, four hundred ninety-one thousand, six hundred forty-one".