159556557696 has 128 divisors (see below), whose sum is σ = 427638312960. Its totient is φ = 52707594240.

The previous prime is 159556557691. The next prime is 159556557701. The reversal of 159556557696 is 696755655951.

It is an interprime number because it is at equal distance from previous prime (159556557691) and next prime (159556557701).

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 159556557696.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159556557691) 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, 74662740 + ... + 74664876.

It is an arithmetic number, because the mean of its divisors is an integer number (3340924320).

Almost surely, 2^159556557696 is an apocalyptic number.

159556557696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 159556557696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213819156480).

159556557696 is an abundant number, since it is smaller than the sum of its proper divisors (268081755264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

159556557696 is a wasteful number, since it uses less digits than its factorization.

159556557696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3812 (or 3800 counting only the distinct ones).

The product of its digits is 382725000, while the sum is 69.

The spelling of 159556557696 in words is "one hundred fifty-nine billion, five hundred fifty-six million, five hundred fifty-seven thousand, six hundred ninety-six".