655165424561556 has 96 divisors (see below), whose sum is σ = 1625824518700032. Its totient is φ = 204630336478720.

The previous prime is 655165424561413. The next prime is 655165424561579.

655165424561556 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×655165424561556² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

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, 1641280111 + ... + 1641679241.

It is an arithmetic number, because the mean of its divisors is an integer number (16935672069792).

Almost surely, 2^{655165424561556} 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 655165424561556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (812912259350016).

655165424561556 is an abundant number, since it is smaller than the sum of its proper divisors (970659094138476).

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

655165424561556 is a wasteful number, since it uses less digits than its factorization.

655165424561556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434829 (or 434827 counting only the distinct ones).

The product of its digits is 648000000, while the sum is 66.

The spelling of 655165424561556 in words is "six hundred fifty-five trillion, one hundred sixty-five billion, four hundred twenty-four million, five hundred sixty-one thousand, five hundred fifty-six".