1426781516819 has 2 divisors, whose sum is σ = 1426781516820. Its totient is φ = 1426781516818.

The previous prime is 1426781516729. The next prime is 1426781516827. The reversal of 1426781516819 is 9186151876241.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1426781516819 - 2¹⁶ = 1426781451283 is a prime.

It is a super-2 number, since 2×1426781516819² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1426781516219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 713390758409 + 713390758410.

It is an arithmetic number, because the mean of its divisors is an integer number (713390758410).

Almost surely, 2^{1426781516819} is an apocalyptic number.

1426781516819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1426781516819 is an equidigital number, since it uses as much as digits as its factorization.

1426781516819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 59.

The spelling of 1426781516819 in words is "one trillion, four hundred twenty-six billion, seven hundred eighty-one million, five hundred sixteen thousand, eight hundred nineteen".