165220344100642 has 16 divisors (see below), whose sum is σ = 262519456241952. Its totient is φ = 77717957739840.

The previous prime is 165220344100589. The next prime is 165220344100657. The reversal of 165220344100642 is 246001443022561.

It is a super-3 number, since 3×165220344100642³ (a number of 44 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165220344100595 and 165220344100604.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1024681488 + ... + 1024842715.

It is an arithmetic number, because the mean of its divisors is an integer number (16407466015122).

Almost surely, 2^{165220344100642} is an apocalyptic number.

165220344100642 is a deficient number, since it is larger than the sum of its proper divisors (97299112141310).

165220344100642 is a wasteful number, since it uses less digits than its factorization.

165220344100642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049526593.

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 165220344100642 in words is "one hundred sixty-five trillion, two hundred twenty billion, three hundred forty-four million, one hundred thousand, six hundred forty-two".