655223991752 has 36 divisors (see below), whose sum is σ = 1350436062465. Its totient is φ = 297817639680.

The previous prime is 655223991739. The next prime is 655223991787. The reversal of 655223991752 is 257199322556.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 608141067556 + 47082924196 = 779834^2 + 216986^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=572374.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 25171448 + ... + 25197464.

Almost surely, 2^655223991752 is an apocalyptic number.

It is an amenable number.

655223991752 is an abundant number, since it is smaller than the sum of its proper divisors (695212070713).

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

655223991752 is an frugal number, since it uses more digits than its factorization.

655223991752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52062 (or 26030 counting only the distinct ones).

The product of its digits is 10206000, while the sum is 56.

The spelling of 655223991752 in words is "six hundred fifty-five billion, two hundred twenty-three million, nine hundred ninety-one thousand, seven hundred fifty-two".