161595493027 has 4 divisors (see below), whose sum is σ = 161597381400. Its totient is φ = 161593604656.

The previous prime is 161595493019. The next prime is 161595493079. The reversal of 161595493027 is 720394595161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 720394595161 = 459703 ⋅1567087.

It is a cyclic number.

It is not a de Polignac number, because 161595493027 - 2³ = 161595493019 is a prime.

It is a super-2 number, since 2×161595493027² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161595493427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 809413 + ... + 989110.

It is an arithmetic number, because the mean of its divisors is an integer number (40399345350).

Almost surely, 2^161595493027 is an apocalyptic number.

161595493027 is a deficient number, since it is larger than the sum of its proper divisors (1888373).

161595493027 is an equidigital number, since it uses as much as digits as its factorization.

161595493027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888372.

The product of its (nonzero) digits is 2041200, while the sum is 52.

The spelling of 161595493027 in words is "one hundred sixty-one billion, five hundred ninety-five million, four hundred ninety-three thousand, twenty-seven".