655604463791 has 8 divisors (see below), whose sum is σ = 671143235664. Its totient is φ = 640078971840.

The previous prime is 655604463751. The next prime is 655604463793. The reversal of 655604463791 is 197364406556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655604463791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655604463793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3220040 + ... + 3417581.

It is an arithmetic number, because the mean of its divisors is an integer number (83892904458).

Almost surely, 2^655604463791 is an apocalyptic number.

655604463791 is a deficient number, since it is larger than the sum of its proper divisors (15538771873).

655604463791 is a wasteful number, since it uses less digits than its factorization.

655604463791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6639961.

The product of its (nonzero) digits is 16329600, while the sum is 56.

The spelling of 655604463791 in words is "six hundred fifty-five billion, six hundred four million, four hundred sixty-three thousand, seven hundred ninety-one".