159721597798 has 16 divisors (see below), whose sum is σ = 274407607584. Its totient is φ = 68302324800.

The previous prime is 159721597769. The next prime is 159721597829. The reversal of 159721597798 is 897795127951.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12475753 + ... + 12488548.

It is an arithmetic number, because the mean of its divisors is an integer number (17150475474).

Almost surely, 2^159721597798 is an apocalyptic number.

159721597798 is a deficient number, since it is larger than the sum of its proper divisors (114686009786).

159721597798 is a wasteful number, since it uses less digits than its factorization.

159721597798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24964767.

The product of its digits is 100018800, while the sum is 70.

The spelling of 159721597798 in words is "one hundred fifty-nine billion, seven hundred twenty-one million, five hundred ninety-seven thousand, seven hundred ninety-eight".