159978747848 has 8 divisors (see below), whose sum is σ = 299960152230. Its totient is φ = 79989373920.

The previous prime is 159978747821. The next prime is 159978747857. The reversal of 159978747848 is 848747879951.

It can be written as a sum of positive squares in only one way, i.e., 118241075044 + 41737672804 = 343862^2 + 204298^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×159978747848² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9998671733 + ... + 9998671748.

Almost surely, 2^159978747848 is an apocalyptic number.

It is an amenable number.

159978747848 is a deficient number, since it is larger than the sum of its proper divisors (139981404382).

159978747848 is a wasteful number, since it uses less digits than its factorization.

159978747848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19997343487 (or 19997343483 counting only the distinct ones).

The product of its digits is 1137991680, while the sum is 77.

The spelling of 159978747848 in words is "one hundred fifty-nine billion, nine hundred seventy-eight million, seven hundred forty-seven thousand, eight hundred forty-eight".