159665404639 has 8 divisors (see below), whose sum is σ = 172178792352. Its totient is φ = 147185078880.

The previous prime is 159665404637. The next prime is 159665404649. The reversal of 159665404639 is 936404566951.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 159665404639 - 2¹ = 159665404637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159665404637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8255452 + ... + 8274769.

It is an arithmetic number, because the mean of its divisors is an integer number (21522349044).

Almost surely, 2^159665404639 is an apocalyptic number.

159665404639 is a deficient number, since it is larger than the sum of its proper divisors (12513387713).

159665404639 is a wasteful number, since it uses less digits than its factorization.

159665404639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16530977.

The product of its (nonzero) digits is 20995200, while the sum is 58.

The spelling of 159665404639 in words is "one hundred fifty-nine billion, six hundred sixty-five million, four hundred four thousand, six hundred thirty-nine".