1610506605553 has 2 divisors, whose sum is σ = 1610506605554. Its totient is φ = 1610506605552.

The previous prime is 1610506605481. The next prime is 1610506605557. The reversal of 1610506605553 is 3555066050161.

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., 898994111409 + 711512494144 = 948153^2 + 843512^2 .

It is an emirp because it is prime and its reverse (3555066050161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1610506605553 - 2⁹ = 1610506605041 is a prime.

It is not a weakly prime, because it can be changed into another prime (1610506605557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805253302776 + 805253302777.

It is an arithmetic number, because the mean of its divisors is an integer number (805253302777).

Almost surely, 2^{1610506605553} is an apocalyptic number.

It is an amenable number.

1610506605553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1610506605553 is an equidigital number, since it uses as much as digits as its factorization.

1610506605553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 405000, while the sum is 43.

The spelling of 1610506605553 in words is "one trillion, six hundred ten billion, five hundred six million, six hundred five thousand, five hundred fifty-three".