1246890245779 has 2 divisors, whose sum is σ = 1246890245780. Its totient is φ = 1246890245778.

The previous prime is 1246890245773. The next prime is 1246890245789. The reversal of 1246890245779 is 9775420986421.

It is a weak prime.

It is an emirp because it is prime and its reverse (9775420986421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1246890245779 - 2³³ = 1238300311187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1246890245779.

It is not a weakly prime, because it can be changed into another prime (1246890245773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623445122889 + 623445122890.

It is an arithmetic number, because the mean of its divisors is an integer number (623445122890).

Almost surely, 2^{1246890245779} is an apocalyptic number.

1246890245779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1246890245779 is an equidigital number, since it uses as much as digits as its factorization.

1246890245779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60963840, while the sum is 64.

The spelling of 1246890245779 in words is "one trillion, two hundred forty-six billion, eight hundred ninety million, two hundred forty-five thousand, seven hundred seventy-nine".