43564540853 has 2 divisors, whose sum is σ = 43564540854. Its totient is φ = 43564540852.

The previous prime is 43564540819. The next prime is 43564540889. The reversal of 43564540853 is 35804546534.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22511401444 + 21053139409 = 150038^2 + 145097^2 .

It is a cyclic number.

It is not a de Polignac number, because 43564540853 - 2⁸ = 43564540597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43564540798 and 43564540807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43564540753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21782270426 + 21782270427.

It is an arithmetic number, because the mean of its divisors is an integer number (21782270427).

Almost surely, 2^43564540853 is an apocalyptic number.

It is an amenable number.

43564540853 is a deficient number, since it is larger than the sum of its proper divisors (1).

43564540853 is an equidigital number, since it uses as much as digits as its factorization.

43564540853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456000, while the sum is 47.

The spelling of 43564540853 in words is "forty-three billion, five hundred sixty-four million, five hundred forty thousand, eight hundred fifty-three".