656403613011 has 12 divisors (see below), whose sum is σ = 948178368280. Its totient is φ = 437584032000.

The previous prime is 656403612913. The next prime is 656403613027. The reversal of 656403613011 is 110316304656.

656403613011 is a `hidden beast` number, since 6 + 5 + 640 + 3 + 6 + 1 + 3 + 0 + 1 + 1 = 666.

It is not a de Polignac number, because 656403613011 - 2¹¹ = 656403610963 is a prime.

It is a super-2 number, since 2×656403613011² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656403613091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1303381 + ... + 1735398.

Almost surely, 2^656403613011 is an apocalyptic number.

656403613011 is a deficient number, since it is larger than the sum of its proper divisors (291774755269).

656403613011 is a wasteful number, since it uses less digits than its factorization.

656403613011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3062786 (or 3062783 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

Adding to 656403613011 its reverse (110316304656), we get a palindrome (766719917667).

The spelling of 656403613011 in words is "six hundred fifty-six billion, four hundred three million, six hundred thirteen thousand, eleven".