159646639 has 6 divisors (see below), whose sum is σ = 163117904. Its totient is φ = 156247740.

The previous prime is 159646637. The next prime is 159646651. The reversal of 159646639 is 936646951.

It is not a de Polignac number, because 159646639 - 2¹ = 159646637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 159646592 and 159646601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159646637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33927 + ... + 38344.

Almost surely, 2^159646639 is an apocalyptic number.

159646639 is a deficient number, since it is larger than the sum of its proper divisors (3471265).

159646639 is an frugal number, since it uses more digits than its factorization.

159646639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72365 (or 72318 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 49.

The square root of 159646639 is about 12635.1351001879. The cubic root of 159646639 is about 542.4835748600.

The spelling of 159646639 in words is "one hundred fifty-nine million, six hundred forty-six thousand, six hundred thirty-nine".