1605436155133 has 2 divisors, whose sum is σ = 1605436155134. Its totient is φ = 1605436155132.

The previous prime is 1605436155119. The next prime is 1605436155161. The reversal of 1605436155133 is 3315516345061.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1576800069849 + 28636085284 = 1255707^2 + 169222^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1605436155133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1605436155133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1605436155233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802718077566 + 802718077567.

It is an arithmetic number, because the mean of its divisors is an integer number (802718077567).

Almost surely, 2^{1605436155133} is an apocalyptic number.

It is an amenable number.

1605436155133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1605436155133 is an equidigital number, since it uses as much as digits as its factorization.

1605436155133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486000, while the sum is 43.

The spelling of 1605436155133 in words is "one trillion, six hundred five billion, four hundred thirty-six million, one hundred fifty-five thousand, one hundred thirty-three".