161204154027 has 16 divisors (see below), whose sum is σ = 245674970112. Its totient is φ = 92105205120.

The previous prime is 161204154019. The next prime is 161204154043. The reversal of 161204154027 is 720451402161.

It is not a de Polignac number, because 161204154027 - 2³ = 161204154019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161204154017) 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, 302878 + ... + 643539.

It is an arithmetic number, because the mean of its divisors is an integer number (15354685632).

Almost surely, 2^161204154027 is an apocalyptic number.

161204154027 is a deficient number, since it is larger than the sum of its proper divisors (84470816085).

161204154027 is an equidigital number, since it uses as much as digits as its factorization.

161204154027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954538.

The product of its (nonzero) digits is 13440, while the sum is 33.

Adding to 161204154027 its reverse (720451402161), we get a palindrome (881655556188).

The spelling of 161204154027 in words is "one hundred sixty-one billion, two hundred four million, one hundred fifty-four thousand, twenty-seven".