656212545013 has 2 divisors, whose sum is σ = 656212545014. Its totient is φ = 656212545012.

The previous prime is 656212544987. The next prime is 656212545017. The reversal of 656212545013 is 310545212656.

656212545013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 650060025169 + 6152519844 = 806263^2 + 78438^2 .

It is a cyclic number.

It is not a de Polignac number, because 656212545013 - 2⁹ = 656212544501 is a prime.

It is a super-2 number, since 2×656212545013² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656212545017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328106272506 + 328106272507.

It is an arithmetic number, because the mean of its divisors is an integer number (328106272507).

Almost surely, 2^656212545013 is an apocalyptic number.

It is an amenable number.

656212545013 is a deficient number, since it is larger than the sum of its proper divisors (1).

656212545013 is an equidigital number, since it uses as much as digits as its factorization.

656212545013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216000, while the sum is 40.

Adding to 656212545013 its reverse (310545212656), we get a palindrome (966757757669).

The spelling of 656212545013 in words is "six hundred fifty-six billion, two hundred twelve million, five hundred forty-five thousand, thirteen".