161606100155 has 16 divisors (see below), whose sum is σ = 200196935424. Its totient is φ = 125105715840.

The previous prime is 161606100143. The next prime is 161606100181. The reversal of 161606100155 is 551001606161.

161606100155 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 161606100155 - 2²⁰ = 161605051579 is a prime.

It is a super-2 number, since 2×161606100155² (a number of 23 digits) contains 22 as substring.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 3050957 + ... + 3103473.

It is an arithmetic number, because the mean of its divisors is an integer number (12512308464).

Almost surely, 2^161606100155 is an apocalyptic number.

161606100155 is a deficient number, since it is larger than the sum of its proper divisors (38590835269).

161606100155 is a wasteful number, since it uses less digits than its factorization.

161606100155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72406.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 161606100155 in words is "one hundred sixty-one billion, six hundred six million, one hundred thousand, one hundred fifty-five".