656202641023 has 4 divisors (see below), whose sum is σ = 665996710360. Its totient is φ = 646408571688.

The previous prime is 656202641011. The next prime is 656202641027. The reversal of 656202641023 is 320146202656.

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 656202641023 - 2¹³ = 656202632831 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 (656202641027) 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, 4897034568 + ... + 4897034701.

It is an arithmetic number, because the mean of its divisors is an integer number (166499177590).

Almost surely, 2^656202641023 is an apocalyptic number.

656202641023 is a deficient number, since it is larger than the sum of its proper divisors (9794069337).

656202641023 is an equidigital number, since it uses as much as digits as its factorization.

656202641023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9794069336.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 656202641023 its reverse (320146202656), we get a palindrome (976348843679).

The spelling of 656202641023 in words is "six hundred fifty-six billion, two hundred two million, six hundred forty-one thousand, twenty-three".