1605616356053 has 2 divisors, whose sum is σ = 1605616356054. Its totient is φ = 1605616356052.

The previous prime is 1605616356041. The next prime is 1605616356061. The reversal of 1605616356053 is 3506536165061.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1395332662564 + 210283693489 = 1181242^2 + 458567^2 .

It is an emirp because it is prime and its reverse (3506536165061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1605616356053 - 2¹² = 1605616351957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1605616355989 and 1605616356007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1605616376053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802808178026 + 802808178027.

It is an arithmetic number, because the mean of its divisors is an integer number (802808178027).

Almost surely, 2^{1605616356053} is an apocalyptic number.

It is an amenable number.

1605616356053 is a deficient number, since it is larger than the sum of its proper divisors (1).

1605616356053 is an equidigital number, since it uses as much as digits as its factorization.

1605616356053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458000, while the sum is 47.

The spelling of 1605616356053 in words is "one trillion, six hundred five billion, six hundred sixteen million, three hundred fifty-six thousand, fifty-three".