161550600105655 has 4 divisors (see below), whose sum is σ = 193860720126792. Its totient is φ = 129240480084520.

The previous prime is 161550600105571. The next prime is 161550600105701. The reversal of 161550600105655 is 556501006055161.

It is a happy number.

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

It is not a de Polignac number, because 161550600105655 - 2¹⁵ = 161550600072887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16155060010561 + ... + 16155060010570.

It is an arithmetic number, because the mean of its divisors is an integer number (48465180031698).

Almost surely, 2^{161550600105655} is an apocalyptic number.

161550600105655 is a deficient number, since it is larger than the sum of its proper divisors (32310120021137).

161550600105655 is an equidigital number, since it uses as much as digits as its factorization.

161550600105655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32310120021136.

The product of its (nonzero) digits is 675000, while the sum is 46.

The spelling of 161550600105655 in words is "one hundred sixty-one trillion, five hundred fifty billion, six hundred million, one hundred five thousand, six hundred fifty-five".