2168158656 has 56 divisors (see below), whose sum is σ = 5766718464. Its totient is φ = 718923520.

The previous prime is 2168158649. The next prime is 2168158673. The reversal of 2168158656 is 6568518612.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7111 + ... + 66233.

Almost surely, 2^2168158656 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 2168158656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2883359232).

2168158656 is an abundant number, since it is smaller than the sum of its proper divisors (3598559808).

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

2168158656 is a wasteful number, since it uses less digits than its factorization.

2168158656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59329 (or 59319 counting only the distinct ones).

The product of its digits is 691200, while the sum is 48.

The square root of 2168158656 is about 46563.4905908052. The cubic root of 2168158656 is about 1294.2862961591.

The spelling of 2168158656 in words is "two billion, one hundred sixty-eight million, one hundred fifty-eight thousand, six hundred fifty-six".