155208668161 has 16 divisors (see below), whose sum is σ = 163350535680. Its totient is φ = 147266645760.

The previous prime is 155208668141. The next prime is 155208668171. The reversal of 155208668161 is 161866802551.

It is a happy number.

It is not a de Polignac number, because 155208668161 - 2¹¹ = 155208666113 is a prime.

It is a super-2 number, since 2×155208668161² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155208668141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2414706 + ... + 2478148.

It is an arithmetic number, because the mean of its divisors is an integer number (10209408480).

Almost surely, 2^155208668161 is an apocalyptic number.

It is an amenable number.

155208668161 is a deficient number, since it is larger than the sum of its proper divisors (8141867519).

155208668161 is a wasteful number, since it uses less digits than its factorization.

155208668161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65016.

The product of its (nonzero) digits is 691200, while the sum is 49.

The spelling of 155208668161 in words is "one hundred fifty-five billion, two hundred eight million, six hundred sixty-eight thousand, one hundred sixty-one".