655620640512 has 36 divisors (see below), whose sum is σ = 1744907019240. Its totient is φ = 218540213248.

The previous prime is 655620640501. The next prime is 655620640583. The reversal of 655620640512 is 215046026556.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426835587 + ... + 426837122.

Almost surely, 2^655620640512 is an apocalyptic number.

It is an amenable number.

655620640512 is an abundant number, since it is smaller than the sum of its proper divisors (1089286378728).

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

655620640512 is an equidigital number, since it uses as much as digits as its factorization.

655620640512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853672728 (or 853672714 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 655620640512 in words is "six hundred fifty-five billion, six hundred twenty million, six hundred forty thousand, five hundred twelve".