161606076385 has 8 divisors (see below), whose sum is σ = 208844775720. Its totient is φ = 119339871744.

The previous prime is 161606076383. The next prime is 161606076407. The reversal of 161606076385 is 583670606161.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1272384 + 161604804001 = 1128^2 + 402001^2 .

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 161606076385 - 2¹ = 161606076383 is a prime.

It is a super-2 number, since 2×161606076385² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161606076383) 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, 1243123600 + ... + 1243123729.

It is an arithmetic number, because the mean of its divisors is an integer number (26105596965).

Almost surely, 2^161606076385 is an apocalyptic number.

It is an amenable number.

161606076385 is a deficient number, since it is larger than the sum of its proper divisors (47238699335).

161606076385 is a wasteful number, since it uses less digits than its factorization.

161606076385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486247347.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 161606076385 in words is "one hundred sixty-one billion, six hundred six million, seventy-six thousand, three hundred eighty-five".