161204963992 has 8 divisors (see below), whose sum is σ = 302259307500. Its totient is φ = 80602481992.

The previous prime is 161204963981. The next prime is 161204964001. The reversal of 161204963992 is 299369402161.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10075310242 + ... + 10075310257.

Almost surely, 2^161204963992 is an apocalyptic number.

It is an amenable number.

161204963992 is a deficient number, since it is larger than the sum of its proper divisors (141054343508).

161204963992 is a wasteful number, since it uses less digits than its factorization.

161204963992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20150620505 (or 20150620501 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 52.

The spelling of 161204963992 in words is "one hundred sixty-one billion, two hundred four million, nine hundred sixty-three thousand, nine hundred ninety-two".