1809162323085 has 32 divisors (see below), whose sum is σ = 3144912841728. Its totient is φ = 882782530560.

The previous prime is 1809162323083. The next prime is 1809162323093. The reversal of 1809162323085 is 5803232619081.

It is not a de Polignac number, because 1809162323085 - 2¹ = 1809162323083 is a prime.

It is a super-2 number, since 2×1809162323085² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1809162323083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41029981 + ... + 41074050.

It is an arithmetic number, because the mean of its divisors is an integer number (98278526304).

Almost surely, 2^{1809162323085} is an apocalyptic number.

1809162323085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1809162323085 is a deficient number, since it is larger than the sum of its proper divisors (1335750518643).

1809162323085 is a wasteful number, since it uses less digits than its factorization.

1809162323085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82104165.

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 1809162323085 in words is "one trillion, eight hundred nine billion, one hundred sixty-two million, three hundred twenty-three thousand, eighty-five".