1782678342091 has 2 divisors, whose sum is σ = 1782678342092. Its totient is φ = 1782678342090.

The previous prime is 1782678342031. The next prime is 1782678342103. The reversal of 1782678342091 is 1902438762871.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1782678342091 - 2⁷ = 1782678341963 is a prime.

It is not a weakly prime, because it can be changed into another prime (1782678342031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 891339171045 + 891339171046.

It is an arithmetic number, because the mean of its divisors is an integer number (891339171046).

Almost surely, 2^{1782678342091} is an apocalyptic number.

1782678342091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1782678342091 is an equidigital number, since it uses as much as digits as its factorization.

1782678342091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8128512, while the sum is 58.

The spelling of 1782678342091 in words is "one trillion, seven hundred eighty-two billion, six hundred seventy-eight million, three hundred forty-two thousand, ninety-one".