1605672239459 has 2 divisors, whose sum is σ = 1605672239460. Its totient is φ = 1605672239458.

The previous prime is 1605672239449. The next prime is 1605672239467. The reversal of 1605672239459 is 9549322765061.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1605672239459 - 2²⁰ = 1605671190883 is a prime.

It is a super-2 number, since 2×1605672239459² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1605672239398 and 1605672239407.

It is not a weakly prime, because it can be changed into another prime (1605672239419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802836119729 + 802836119730.

It is an arithmetic number, because the mean of its divisors is an integer number (802836119730).

Almost surely, 2^{1605672239459} is an apocalyptic number.

1605672239459 is a deficient number, since it is larger than the sum of its proper divisors (1).

1605672239459 is an equidigital number, since it uses as much as digits as its factorization.

1605672239459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24494400, while the sum is 59.

The spelling of 1605672239459 in words is "one trillion, six hundred five billion, six hundred seventy-two million, two hundred thirty-nine thousand, four hundred fifty-nine".