655566738552 has 64 divisors (see below), whose sum is σ = 1986565881600. Its totient is φ = 198656586720.

The previous prime is 655566738539. The next prime is 655566738553. The reversal of 655566738552 is 255837665556.

655566738552 is a `hidden beast` number, since 6 + 5 + 5 + 5 + 6 + 6 + 73 + 8 + 552 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 655566738552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655566738553) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 137953588 + ... + 137958339.

It is an arithmetic number, because the mean of its divisors is an integer number (31040091900).

Almost surely, 2^655566738552 is an apocalyptic number.

It is an amenable number.

655566738552 is an abundant number, since it is smaller than the sum of its proper divisors (1330999143048).

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

655566738552 is a wasteful number, since it uses less digits than its factorization.

655566738552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275911953 (or 275911943 counting only the distinct ones).

The product of its digits is 226800000, while the sum is 63.

The spelling of 655566738552 in words is "six hundred fifty-five billion, five hundred sixty-six million, seven hundred thirty-eight thousand, five hundred fifty-two".