678080454756643 has 2 divisors, whose sum is σ = 678080454756644. Its totient is φ = 678080454756642.

The previous prime is 678080454756581. The next prime is 678080454756647. The reversal of 678080454756643 is 346657454080876.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678080454756643 is a prime.

It is not a weakly prime, because it can be changed into another prime (678080454756647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339040227378321 + 339040227378322.

It is an arithmetic number, because the mean of its divisors is an integer number (339040227378322).

Almost surely, 2^{678080454756643} is an apocalyptic number.

678080454756643 is a deficient number, since it is larger than the sum of its proper divisors (1).

678080454756643 is an equidigital number, since it uses as much as digits as its factorization.

678080454756643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3251404800, while the sum is 73.

The spelling of 678080454756643 in words is "six hundred seventy-eight trillion, eighty billion, four hundred fifty-four million, seven hundred fifty-six thousand, six hundred forty-three".