163540041401642 has 4 divisors (see below), whose sum is σ = 245310062102466. Its totient is φ = 81770020700820.

The previous prime is 163540041401629. The next prime is 163540041401651. The reversal of 163540041401642 is 246104140045361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 104724501783001 + 58815539618641 = 10233499^2 + 7669129^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 163540041401642.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40885010350409 + ... + 40885010350412.

Almost surely, 2^{163540041401642} is an apocalyptic number.

163540041401642 is a deficient number, since it is larger than the sum of its proper divisors (81770020700824).

163540041401642 is an equidigital number, since it uses as much as digits as its factorization.

163540041401642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81770020700823.

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 163540041401642 in words is "one hundred sixty-three trillion, five hundred forty billion, forty-one million, four hundred one thousand, six hundred forty-two".