1285717392847 has 2 divisors, whose sum is σ = 1285717392848. Its totient is φ = 1285717392846.

The previous prime is 1285717392829. The next prime is 1285717392913. The reversal of 1285717392847 is 7482937175821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1285717392847 - 2¹⁹ = 1285716868559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285717392247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642858696423 + 642858696424.

It is an arithmetic number, because the mean of its divisors is an integer number (642858696424).

Almost surely, 2^{1285717392847} is an apocalyptic number.

1285717392847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285717392847 is an equidigital number, since it uses as much as digits as its factorization.

1285717392847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47416320, while the sum is 64.

The spelling of 1285717392847 in words is "one trillion, two hundred eighty-five billion, seven hundred seventeen million, three hundred ninety-two thousand, eight hundred forty-seven".