161006239156481 has 16 divisors (see below), whose sum is σ = 165417534132480. Its totient is φ = 156618056027520.

The previous prime is 161006239156471. The next prime is 161006239156487. The reversal of 161006239156481 is 184651932600161.

It is a cyclic number.

It is not a de Polignac number, because 161006239156481 - 2¹⁸ = 161006238894337 is a prime.

It is a super-2 number, since 2×161006239156481² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161006239156487) 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, 269431235 + ... + 270028151.

It is an arithmetic number, because the mean of its divisors is an integer number (10338595883280).

Almost surely, 2^{161006239156481} is an apocalyptic number.

It is an amenable number.

161006239156481 is a deficient number, since it is larger than the sum of its proper divisors (4411294975999).

161006239156481 is a wasteful number, since it uses less digits than its factorization.

161006239156481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616264.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 161006239156481 in words is "one hundred sixty-one trillion, six billion, two hundred thirty-nine million, one hundred fifty-six thousand, four hundred eighty-one".