656555161068 has 144 divisors (see below), whose sum is σ = 1723025239936. Its totient is φ = 210645308160.

The previous prime is 656555161061. The next prime is 656555161091. The reversal of 656555161068 is 860161555656.

It is a happy number.

656555161068 is a `hidden beast` number, since 6 + 5 + 6 + 55 + 516 + 10 + 68 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (656555161061) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 183855723 + ... + 183859293.

Almost surely, 2^656555161068 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 656555161068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (861512619968).

656555161068 is an abundant number, since it is smaller than the sum of its proper divisors (1066470078868).

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

656555161068 is a wasteful number, since it uses less digits than its factorization.

656555161068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5324 (or 5319 counting only the distinct ones).

The product of its (nonzero) digits is 6480000, while the sum is 54.

The spelling of 656555161068 in words is "six hundred fifty-six billion, five hundred fifty-five million, one hundred sixty-one thousand, sixty-eight".