161304451642 has 8 divisors (see below), whose sum is σ = 242064748800. Its totient is φ = 80616202044.

The previous prime is 161304451613. The next prime is 161304451657. The reversal of 161304451642 is 246154403161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×161304451642² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18006292 + ... + 18015247.

It is an arithmetic number, because the mean of its divisors is an integer number (30258093600).

Almost surely, 2^161304451642 is an apocalyptic number.

161304451642 is a deficient number, since it is larger than the sum of its proper divisors (80760297158).

161304451642 is a wasteful number, since it uses less digits than its factorization.

161304451642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36023780.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 161304451642 in words is "one hundred sixty-one billion, three hundred four million, four hundred fifty-one thousand, six hundred forty-two".