168258031656 has 128 divisors (see below), whose sum is σ = 497333692800. Its totient is φ = 46765255680.

The previous prime is 168258031649. The next prime is 168258031681. The reversal of 168258031656 is 656130852861.

It is a happy number.

168258031656 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 168258031599 and 168258031608.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 382690 + ... + 694958.

It is an arithmetic number, because the mean of its divisors is an integer number (3885419475).

Almost surely, 2^168258031656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168258031656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248666846400).

168258031656 is an abundant number, since it is smaller than the sum of its proper divisors (329075661144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168258031656 is a wasteful number, since it uses less digits than its factorization.

168258031656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312459 (or 312455 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 51.

The spelling of 168258031656 in words is "one hundred sixty-eight billion, two hundred fifty-eight million, thirty-one thousand, six hundred fifty-six".