161834654089 has 4 divisors (see below), whose sum is σ = 161835811456. Its totient is φ = 161833496724.

The previous prime is 161834654083. The next prime is 161834654117. The reversal of 161834654089 is 980456438161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 161834654089 - 2²¹ = 161832556937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161834654083) 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, 334629 + ... + 660034.

It is an arithmetic number, because the mean of its divisors is an integer number (40458952864).

Almost surely, 2^161834654089 is an apocalyptic number.

It is an amenable number.

161834654089 is a deficient number, since it is larger than the sum of its proper divisors (1157367).

161834654089 is an equidigital number, since it uses as much as digits as its factorization.

161834654089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157366.

The product of its (nonzero) digits is 4976640, while the sum is 55.

The spelling of 161834654089 in words is "one hundred sixty-one billion, eight hundred thirty-four million, six hundred fifty-four thousand, eighty-nine".