2780605217743 has 2 divisors, whose sum is σ = 2780605217744. Its totient is φ = 2780605217742.

The previous prime is 2780605217729. The next prime is 2780605217771. The reversal of 2780605217743 is 3477125060872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2780605217743 - 2⁵ = 2780605217711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2780605217783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390302608871 + 1390302608872.

It is an arithmetic number, because the mean of its divisors is an integer number (1390302608872).

Almost surely, 2^{2780605217743} is an apocalyptic number.

2780605217743 is a deficient number, since it is larger than the sum of its proper divisors (1).

2780605217743 is an equidigital number, since it uses as much as digits as its factorization.

2780605217743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3951360, while the sum is 52.

The spelling of 2780605217743 in words is "two trillion, seven hundred eighty billion, six hundred five million, two hundred seventeen thousand, seven hundred forty-three".