656011000221 has 8 divisors (see below), whose sum is σ = 898321369824. Its totient is φ = 425520648720.

The previous prime is 656011000219. The next prime is 656011000277. The reversal of 656011000221 is 122000110656.

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

It is not a de Polignac number, because 656011000221 - 2¹ = 656011000219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 656011000191 and 656011000200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656011050221) 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 7 ways as a sum of consecutive naturals, for example, 2955004395 + ... + 2955004616.

It is an arithmetic number, because the mean of its divisors is an integer number (112290171228).

Almost surely, 2^656011000221 is an apocalyptic number.

It is an amenable number.

656011000221 is a deficient number, since it is larger than the sum of its proper divisors (242310369603).

656011000221 is a wasteful number, since it uses less digits than its factorization.

656011000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5910009051.

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 656011000221 its reverse (122000110656), we get a palindrome (778011110877).

The spelling of 656011000221 in words is "six hundred fifty-six billion, eleven million, two hundred twenty-one", and thus it is an aban number.