1456817639819 has 2 divisors, whose sum is σ = 1456817639820. Its totient is φ = 1456817639818.

The previous prime is 1456817639791. The next prime is 1456817639833. The reversal of 1456817639819 is 9189367186541.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1456817639819 is a prime.

It is a super-2 number, since 2×1456817639819² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1456817639869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 728408819909 + 728408819910.

It is an arithmetic number, because the mean of its divisors is an integer number (728408819910).

Almost surely, 2^{1456817639819} is an apocalyptic number.

1456817639819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1456817639819 is an equidigital number, since it uses as much as digits as its factorization.

1456817639819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78382080, while the sum is 68.

The spelling of 1456817639819 in words is "one trillion, four hundred fifty-six billion, eight hundred seventeen million, six hundred thirty-nine thousand, eight hundred nineteen".