655663760639 has 8 divisors (see below), whose sum is σ = 690750921840. Its totient is φ = 620634453696.

The previous prime is 655663760627. The next prime is 655663760669. The reversal of 655663760639 is 936067366556.

655663760639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 655663760639 - 2¹⁶ = 655663695103 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 (655663760669) 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, 14440292 + ... + 14485625.

It is an arithmetic number, because the mean of its divisors is an integer number (86343865230).

Almost surely, 2^655663760639 is an apocalyptic number.

655663760639 is a deficient number, since it is larger than the sum of its proper divisors (35087161201).

655663760639 is a wasteful number, since it uses less digits than its factorization.

655663760639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28927129.

The product of its (nonzero) digits is 110224800, while the sum is 62.

The spelling of 655663760639 in words is "six hundred fifty-five billion, six hundred sixty-three million, seven hundred sixty thousand, six hundred thirty-nine".