56620216729 has 2 divisors, whose sum is σ = 56620216730. Its totient is φ = 56620216728.

The previous prime is 56620216721. The next prime is 56620216789. The reversal of 56620216729 is 92761202665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37977045129 + 18643171600 = 194877^2 + 136540^2 .

It is a cyclic number.

It is not a de Polignac number, because 56620216729 - 2³ = 56620216721 is a prime.

It is not a weakly prime, because it can be changed into another prime (56620216721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28310108364 + 28310108365.

It is an arithmetic number, because the mean of its divisors is an integer number (28310108365).

Almost surely, 2^56620216729 is an apocalyptic number.

It is an amenable number.

56620216729 is a deficient number, since it is larger than the sum of its proper divisors (1).

56620216729 is an equidigital number, since it uses as much as digits as its factorization.

56620216729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 56620216729 in words is "fifty-six billion, six hundred twenty million, two hundred sixteen thousand, seven hundred twenty-nine".