656598849639156 has 144 divisors (see below), whose sum is σ = 1714737254630400. Its totient is φ = 211625443929600.

The previous prime is 656598849639151. The next prime is 656598849639287. The reversal of 656598849639156 is 651936948895656.

656598849639156 is a `hidden beast` number, since 6 + 5 + 6 + 5 + 9 + 8 + 84 + 96 + 391 + 56 = 666.

It is a super-2 number, since 2×656598849639156² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656598849639151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29942022400 + ... + 29942044328.

It is an arithmetic number, because the mean of its divisors is an integer number (11907897601600).

Almost surely, 2^{656598849639156} 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 656598849639156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (857368627315200).

656598849639156 is an abundant number, since it is smaller than the sum of its proper divisors (1058138404991244).

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

656598849639156 is a wasteful number, since it uses less digits than its factorization.

656598849639156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43630 (or 43625 counting only the distinct ones).

The product of its digits is 90699264000, while the sum is 90.

The spelling of 656598849639156 in words is "six hundred fifty-six trillion, five hundred ninety-eight billion, eight hundred forty-nine million, six hundred thirty-nine thousand, one hundred fifty-six".