655644000446556 has 72 divisors (see below), whose sum is σ = 1685666657487120. Its totient is φ = 198194229784320.

The previous prime is 655644000446551. The next prime is 655644000446593.

655644000446556 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×655644000446556² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 655644000446556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655644000446551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 551417691 + ... + 552605426.

Almost surely, 2^{655644000446556} is an apocalyptic number.

655644000446556 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

655644000446556 is an abundant number, since it is smaller than the sum of its proper divisors (1030022657040564).

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

655644000446556 is a wasteful number, since it uses less digits than its factorization.

655644000446556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104023555 (or 1104023542 counting only the distinct ones).

The product of its (nonzero) digits is 207360000, while the sum is 60.

The spelling of 655644000446556 in words is "six hundred fifty-five trillion, six hundred forty-four billion, four hundred forty-six thousand, five hundred fifty-six".