161466842585 has 8 divisors (see below), whose sum is σ = 193806183816. Its totient is φ = 129142825600.

The previous prime is 161466842573. The next prime is 161466842591. The reversal of 161466842585 is 585248664161.

It can be written as a sum of positive squares in 4 ways, for example, as 5614804624 + 155852037961 = 74932^2 + 394781^2 .

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

It is not a de Polignac number, because 161466842585 - 2¹⁶ = 161466777049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161466842585.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3807866 + ... + 3850035.

It is an arithmetic number, because the mean of its divisors is an integer number (24225772977).

Almost surely, 2^161466842585 is an apocalyptic number.

It is an amenable number.

161466842585 is a deficient number, since it is larger than the sum of its proper divisors (32339341231).

161466842585 is an equidigital number, since it uses as much as digits as its factorization.

161466842585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7662123.

The product of its digits is 11059200, while the sum is 56.

The spelling of 161466842585 in words is "one hundred sixty-one billion, four hundred sixty-six million, eight hundred forty-two thousand, five hundred eighty-five".