161798660204 has 12 divisors (see below), whose sum is σ = 283192522704. Its totient is φ = 80886510864.

The previous prime is 161798660203. The next prime is 161798660239. The reversal of 161798660204 is 402066897161.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (161798660203) 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, 3176384 + ... + 3226919.

It is an arithmetic number, because the mean of its divisors is an integer number (23599376892).

Almost surely, 2^161798660204 is an apocalyptic number.

It is an amenable number.

161798660204 is a deficient number, since it is larger than the sum of its proper divisors (121393862500).

161798660204 is a wasteful number, since it uses less digits than its factorization.

161798660204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6409624 (or 6409622 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 161798660204 in words is "one hundred sixty-one billion, seven hundred ninety-eight million, six hundred sixty thousand, two hundred four".