161777600539 has 8 divisors (see below), whose sum is σ = 162438296400. Its totient is φ = 161117147136.

The previous prime is 161777600527. The next prime is 161777600597. The reversal of 161777600539 is 935006777161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161777600539 - 2¹⁷ = 161777469467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161777603539) 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 7 ways as a sum of consecutive naturals, for example, 1342632 + ... + 1458154.

It is an arithmetic number, because the mean of its divisors is an integer number (20304787050).

Almost surely, 2^161777600539 is an apocalyptic number.

161777600539 is a deficient number, since it is larger than the sum of its proper divisors (660695861).

161777600539 is a wasteful number, since it uses less digits than its factorization.

161777600539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121229.

The product of its (nonzero) digits is 1666980, while the sum is 52.

The spelling of 161777600539 in words is "one hundred sixty-one billion, seven hundred seventy-seven million, six hundred thousand, five hundred thirty-nine".