161501936589 has 96 divisors (see below), whose sum is σ = 296038229760. Its totient is φ = 85880881152.

The previous prime is 161501936579. The next prime is 161501936611. The reversal of 161501936589 is 985639105161.

161501936589 is a `hidden beast` number, since 1 + 6 + 1 + 50 + 1 + 9 + 3 + 6 + 589 = 666.

It is not a de Polignac number, because 161501936589 - 2⁸ = 161501936333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161501936509) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2542237 + ... + 2604989.

It is an arithmetic number, because the mean of its divisors is an integer number (3083731560).

Almost surely, 2^161501936589 is an apocalyptic number.

It is an amenable number.

161501936589 is a deficient number, since it is larger than the sum of its proper divisors (134536293171).

161501936589 is an equidigital number, since it uses as much as digits as its factorization.

161501936589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62881 (or 62869 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 54.

The spelling of 161501936589 in words is "one hundred sixty-one billion, five hundred one million, nine hundred thirty-six thousand, five hundred eighty-nine".