56400362209 has 2 divisors, whose sum is σ = 56400362210. Its totient is φ = 56400362208.

The previous prime is 56400362167. The next prime is 56400362257. The reversal of 56400362209 is 90226300465.

56400362209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40763610000 + 15636752209 = 201900^2 + 125047^2 .

It is a cyclic number.

It is not a de Polignac number, because 56400362209 - 2¹⁵ = 56400329441 is a prime.

It is not a weakly prime, because it can be changed into another prime (56400362269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28200181104 + 28200181105.

It is an arithmetic number, because the mean of its divisors is an integer number (28200181105).

Almost surely, 2^56400362209 is an apocalyptic number.

It is an amenable number.

56400362209 is a deficient number, since it is larger than the sum of its proper divisors (1).

56400362209 is an equidigital number, since it uses as much as digits as its factorization.

56400362209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 37.

It can be divided in two parts, 56400 and 362209, that added together give a square (418609 = 647²).

The spelling of 56400362209 in words is "fifty-six billion, four hundred million, three hundred sixty-two thousand, two hundred nine".