655645546556 has 144 divisors (see below), whose sum is σ = 1555231060992. Its totient is φ = 235337477760.

The previous prime is 655645546499. The next prime is 655645546573.

It is a happy number.

655645546556 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×655645546556² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23020781 + ... + 23049243.

Almost surely, 2^655645546556 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 655645546556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (777615530496).

655645546556 is an abundant number, since it is smaller than the sum of its proper divisors (899585514436).

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

655645546556 is a wasteful number, since it uses less digits than its factorization.

655645546556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29032 (or 29019 counting only the distinct ones).

The product of its digits is 324000000, while the sum is 62.

The spelling of 655645546556 in words is "six hundred fifty-five billion, six hundred forty-five million, five hundred forty-six thousand, five hundred fifty-six".