1779849640799 has 2 divisors, whose sum is σ = 1779849640800. Its totient is φ = 1779849640798.

The previous prime is 1779849640787. The next prime is 1779849640813. The reversal of 1779849640799 is 9970469489771.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1779849640799 - 2¹² = 1779849636703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1779849640759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 889924820399 + 889924820400.

It is an arithmetic number, because the mean of its divisors is an integer number (889924820400).

Almost surely, 2^{1779849640799} is an apocalyptic number.

1779849640799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1779849640799 is an equidigital number, since it uses as much as digits as its factorization.

1779849640799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728324864, while the sum is 80.

The spelling of 1779849640799 in words is "one trillion, seven hundred seventy-nine billion, eight hundred forty-nine million, six hundred forty thousand, seven hundred ninety-nine".