1782678342451 has 2 divisors, whose sum is σ = 1782678342452. Its totient is φ = 1782678342450.

The previous prime is 1782678342443. The next prime is 1782678342457. The reversal of 1782678342451 is 1542438762871.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1782678342451 - 2³ = 1782678342443 is a prime.

It is not a weakly prime, because it can be changed into another prime (1782678342457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 891339171225 + 891339171226.

It is an arithmetic number, because the mean of its divisors is an integer number (891339171226).

Almost surely, 2^{1782678342451} is an apocalyptic number.

1782678342451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1782678342451 is an equidigital number, since it uses as much as digits as its factorization.

1782678342451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18063360, while the sum is 58.

The spelling of 1782678342451 in words is "one trillion, seven hundred eighty-two billion, six hundred seventy-eight million, three hundred forty-two thousand, four hundred fifty-one".