431565565049 has 2 divisors, whose sum is σ = 431565565050. Its totient is φ = 431565565048.

The previous prime is 431565564973. The next prime is 431565565153. The reversal of 431565565049 is 940565565134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 342974209600 + 88591355449 = 585640^2 + 297643^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431565565049 is a prime.

It is not a weakly prime, because it can be changed into another prime (431565565649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215782782524 + 215782782525.

It is an arithmetic number, because the mean of its divisors is an integer number (215782782525).

Almost surely, 2^431565565049 is an apocalyptic number.

It is an amenable number.

431565565049 is a deficient number, since it is larger than the sum of its proper divisors (1).

431565565049 is an equidigital number, since it uses as much as digits as its factorization.

431565565049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720000, while the sum is 53.

The spelling of 431565565049 in words is "four hundred thirty-one billion, five hundred sixty-five million, five hundred sixty-five thousand, forty-nine".