2780605217783 has 2 divisors, whose sum is σ = 2780605217784. Its totient is φ = 2780605217782.

The previous prime is 2780605217771. The next prime is 2780605217809. The reversal of 2780605217783 is 3877125060872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2780605217783 - 2³⁴ = 2763425348599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2780605217743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390302608891 + 1390302608892.

It is an arithmetic number, because the mean of its divisors is an integer number (1390302608892).

Almost surely, 2^{2780605217783} is an apocalyptic number.

2780605217783 is a deficient number, since it is larger than the sum of its proper divisors (1).

2780605217783 is an equidigital number, since it uses as much as digits as its factorization.

2780605217783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7902720, while the sum is 56.

The spelling of 2780605217783 in words is "two trillion, seven hundred eighty billion, six hundred five million, two hundred seventeen thousand, seven hundred eighty-three".