161469370985 has 12 divisors (see below), whose sum is σ = 209814639372. Its totient is φ = 119238919488.

The previous prime is 161469370949. The next prime is 161469370999. The reversal of 161469370985 is 589073964161.

It can be written as a sum of positive squares in 6 ways, for example, as 17170433296 + 144298937689 = 131036^2 + 379867^2 .

It is not a de Polignac number, because 161469370985 - 2⁶ = 161469370921 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95543162 + ... + 95544851.

It is an arithmetic number, because the mean of its divisors is an integer number (17484553281).

Almost surely, 2^161469370985 is an apocalyptic number.

It is an amenable number.

161469370985 is a deficient number, since it is larger than the sum of its proper divisors (48345268387).

161469370985 is a wasteful number, since it uses less digits than its factorization.

161469370985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191088044 (or 191088031 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 59.

The spelling of 161469370985 in words is "one hundred sixty-one billion, four hundred sixty-nine million, three hundred seventy thousand, nine hundred eighty-five".