161357144239 has 16 divisors (see below), whose sum is σ = 166916111616. Its totient is φ = 155820672000.

The previous prime is 161357144203. The next prime is 161357144251. The reversal of 161357144239 is 932441753161.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161357144239 is a prime.

It is a super-2 number, since 2×161357144239² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161357144939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44608959 + ... + 44612575.

It is an arithmetic number, because the mean of its divisors is an integer number (10432256976).

Almost surely, 2^161357144239 is an apocalyptic number.

161357144239 is a deficient number, since it is larger than the sum of its proper divisors (5558967377).

161357144239 is a wasteful number, since it uses less digits than its factorization.

161357144239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6306.

The product of its digits is 544320, while the sum is 46.

The spelling of 161357144239 in words is "one hundred sixty-one billion, three hundred fifty-seven million, one hundred forty-four thousand, two hundred thirty-nine".