161420208655 has 32 divisors (see below), whose sum is σ = 204289671168. Its totient is φ = 122286931200.

The previous prime is 161420208641. The next prime is 161420208671. The reversal of 161420208655 is 556802024161.

161420208655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161420208655 - 2⁷ = 161420208527 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1380840 + ... + 1493170.

It is an arithmetic number, because the mean of its divisors is an integer number (6384052224).

Almost surely, 2^161420208655 is an apocalyptic number.

161420208655 is a deficient number, since it is larger than the sum of its proper divisors (42869462513).

161420208655 is a wasteful number, since it uses less digits than its factorization.

161420208655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112567.

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 161420208655 in words is "one hundred sixty-one billion, four hundred twenty million, two hundred eight thousand, six hundred fifty-five".