1646523605347 has 2 divisors, whose sum is σ = 1646523605348. Its totient is φ = 1646523605346.

The previous prime is 1646523605269. The next prime is 1646523605431. The reversal of 1646523605347 is 7435063256461.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1646523605347 - 2²³ = 1646515216739 is a prime.

It is a super-2 number, since 2×1646523605347² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1646523605294 and 1646523605303.

It is not a weakly prime, because it can be changed into another prime (1646523600347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 823261802673 + 823261802674.

It is an arithmetic number, because the mean of its divisors is an integer number (823261802674).

Almost surely, 2^{1646523605347} is an apocalyptic number.

1646523605347 is a deficient number, since it is larger than the sum of its proper divisors (1).

1646523605347 is an equidigital number, since it uses as much as digits as its factorization.

1646523605347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10886400, while the sum is 52.

The spelling of 1646523605347 in words is "one trillion, six hundred forty-six billion, five hundred twenty-three million, six hundred five thousand, three hundred forty-seven".