655717306523 has 4 divisors (see below), whose sum is σ = 656081393448. Its totient is φ = 655353219600.

The previous prime is 655717306469. The next prime is 655717306547. The reversal of 655717306523 is 325603717556.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 655717306523 - 2¹⁰ = 655717305499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655717306723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182040761 + ... + 182044362.

It is an arithmetic number, because the mean of its divisors is an integer number (164020348362).

Almost surely, 2^655717306523 is an apocalyptic number.

655717306523 is a deficient number, since it is larger than the sum of its proper divisors (364086925).

655717306523 is a wasteful number, since it uses less digits than its factorization.

655717306523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364086924.

The product of its (nonzero) digits is 3969000, while the sum is 50.

The spelling of 655717306523 in words is "six hundred fifty-five billion, seven hundred seventeen million, three hundred six thousand, five hundred twenty-three".