161243530659 has 16 divisors (see below), whose sum is σ = 238893706240. Its totient is φ = 107489206440.

The previous prime is 161243530619. The next prime is 161243530661. The reversal of 161243530659 is 956035342161.

161243530659 is a `hidden beast` number, since 1 + 6 + 12 + 43 + 530 + 65 + 9 = 666.

It is not a de Polignac number, because 161243530659 - 2¹³ = 161243522467 is a prime.

It is a super-3 number, since 3×161243530659³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161243530619) 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, 299334 + ... + 641940.

It is an arithmetic number, because the mean of its divisors is an integer number (14930856640).

Almost surely, 2^161243530659 is an apocalyptic number.

161243530659 is a deficient number, since it is larger than the sum of its proper divisors (77650175581).

161243530659 is a wasteful number, since it uses less digits than its factorization.

161243530659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360047 (or 360041 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The spelling of 161243530659 in words is "one hundred sixty-one billion, two hundred forty-three million, five hundred thirty thousand, six hundred fifty-nine".