168556655861 has 32 divisors (see below), whose sum is σ = 189649993728. Its totient is φ = 148518152640.

The previous prime is 168556655837. The next prime is 168556655863.

168556655861 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 168556655861 - 2¹⁰ = 168556654837 is a prime.

It is a super-2 number, since 2×168556655861² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168556655794 and 168556655803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168556655863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11910956 + ... + 11925098.

It is an arithmetic number, because the mean of its divisors is an integer number (5926562304).

Almost surely, 2^168556655861 is an apocalyptic number.

168556655861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

168556655861 is a deficient number, since it is larger than the sum of its proper divisors (21093337867).

168556655861 is a wasteful number, since it uses less digits than its factorization.

168556655861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14481.

The product of its digits is 51840000, while the sum is 62.

The spelling of 168556655861 in words is "one hundred sixty-eight billion, five hundred fifty-six million, six hundred fifty-five thousand, eight hundred sixty-one".