656393600911 has 4 divisors (see below), whose sum is σ = 663768810000. Its totient is φ = 649018391824.

The previous prime is 656393600897. The next prime is 656393600917. The reversal of 656393600911 is 119006393656.

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 656393600911 - 2¹⁷ = 656393469839 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 (656393600917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3687604411 + ... + 3687604588.

It is an arithmetic number, because the mean of its divisors is an integer number (165942202500).

Almost surely, 2^656393600911 is an apocalyptic number.

656393600911 is a deficient number, since it is larger than the sum of its proper divisors (7375209089).

656393600911 is an equidigital number, since it uses as much as digits as its factorization.

656393600911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7375209088.

The product of its (nonzero) digits is 787320, while the sum is 49.

The spelling of 656393600911 in words is "six hundred fifty-six billion, three hundred ninety-three million, six hundred thousand, nine hundred eleven".