161205160654 has 4 divisors (see below), whose sum is σ = 241807740984. Its totient is φ = 80602580326.

The previous prime is 161205160651. The next prime is 161205160703. The reversal of 161205160654 is 456061502161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 456061502161 = 113 ⋅4035942497.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161205160651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40301290162 + ... + 40301290165.

It is an arithmetic number, because the mean of its divisors is an integer number (60451935246).

Almost surely, 2^161205160654 is an apocalyptic number.

161205160654 is a deficient number, since it is larger than the sum of its proper divisors (80602580330).

161205160654 is an equidigital number, since it uses as much as digits as its factorization.

161205160654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80602580329.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 161205160654 in words is "one hundred sixty-one billion, two hundred five million, one hundred sixty thousand, six hundred fifty-four".