159236989961 has 24 divisors (see below), whose sum is σ = 191049342336. Its totient is φ = 132262015200.

The previous prime is 159236989949. The next prime is 159236989963. The reversal of 159236989961 is 169989632951.

It is a de Polignac number, because none of the positive numbers 2^k-159236989961 is a prime.

It is a super-2 number, since 2×159236989961² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 159236989891 and 159236989900.

It is not an unprimeable number, because it can be changed into a prime (159236989963) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109691 + ... + 574896.

It is an arithmetic number, because the mean of its divisors is an integer number (7960389264).

Almost surely, 2^159236989961 is an apocalyptic number.

It is an amenable number.

159236989961 is a deficient number, since it is larger than the sum of its proper divisors (31812352375).

159236989961 is a wasteful number, since it uses less digits than its factorization.

159236989961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684749 (or 684742 counting only the distinct ones).

The product of its digits is 56687040, while the sum is 68.

The spelling of 159236989961 in words is "one hundred fifty-nine billion, two hundred thirty-six million, nine hundred eighty-nine thousand, nine hundred sixty-one".