159397824661 has 16 divisors (see below), whose sum is σ = 164053693440. Its totient is φ = 154779690880.

The previous prime is 159397824653. The next prime is 159397824697. The reversal of 159397824661 is 166428793951.

It is a cyclic number.

It is not a de Polignac number, because 159397824661 - 2³ = 159397824653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 159397824661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159397824601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12158436 + ... + 12171538.

It is an arithmetic number, because the mean of its divisors is an integer number (10253355840).

Almost surely, 2^159397824661 is an apocalyptic number.

It is an amenable number.

159397824661 is a deficient number, since it is larger than the sum of its proper divisors (4655868779).

159397824661 is a wasteful number, since it uses less digits than its factorization.

159397824661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14516.

The product of its digits is 19595520, while the sum is 61.

The spelling of 159397824661 in words is "one hundred fifty-nine billion, three hundred ninety-seven million, eight hundred twenty-four thousand, six hundred sixty-one".