161616150051569 has 2 divisors, whose sum is σ = 161616150051570. Its totient is φ = 161616150051568.

The previous prime is 161616150051529. The next prime is 161616150051607. The reversal of 161616150051569 is 965150051616161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85806651923344 + 75809498128225 = 9263188^2 + 8706865^2 .

It is an emirp because it is prime and its reverse (965150051616161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161616150051569 - 2¹⁶ = 161616149986033 is a prime.

It is a super-2 number, since 2×161616150051569² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161616150051569.

It is not a weakly prime, because it can be changed into another prime (161616150051529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80808075025784 + 80808075025785.

It is an arithmetic number, because the mean of its divisors is an integer number (80808075025785).

Almost surely, 2^{161616150051569} is an apocalyptic number.

It is an amenable number.

161616150051569 is a deficient number, since it is larger than the sum of its proper divisors (1).

161616150051569 is an equidigital number, since it uses as much as digits as its factorization.

161616150051569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458000, while the sum is 53.

The spelling of 161616150051569 in words is "one hundred sixty-one trillion, six hundred sixteen billion, one hundred fifty million, fifty-one thousand, five hundred sixty-nine".