1769431507409 has 2 divisors, whose sum is σ = 1769431507410. Its totient is φ = 1769431507408.

The previous prime is 1769431507379. The next prime is 1769431507421. The reversal of 1769431507409 is 9047051349671.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1163587217809 + 605844289600 = 1078697^2 + 778360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1769431507409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1769431507489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 884715753704 + 884715753705.

It is an arithmetic number, because the mean of its divisors is an integer number (884715753705).

Almost surely, 2^{1769431507409} is an apocalyptic number.

It is an amenable number.

1769431507409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1769431507409 is an equidigital number, since it uses as much as digits as its factorization.

1769431507409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5715360, while the sum is 56.

The spelling of 1769431507409 in words is "one trillion, seven hundred sixty-nine billion, four hundred thirty-one million, five hundred seven thousand, four hundred nine".