161134753476661 has 2 divisors, whose sum is σ = 161134753476662. Its totient is φ = 161134753476660.

The previous prime is 161134753476623. The next prime is 161134753476761. The reversal of 161134753476661 is 166674357431161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85818564796561 + 75316188680100 = 9263831^2 + 8678490^2 .

It is a cyclic number.

It is not a de Polignac number, because 161134753476661 - 2¹¹ = 161134753474613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161134753476661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161134753476161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80567376738330 + 80567376738331.

It is an arithmetic number, because the mean of its divisors is an integer number (80567376738331).

Almost surely, 2^{161134753476661} is an apocalyptic number.

It is an amenable number.

161134753476661 is a deficient number, since it is larger than the sum of its proper divisors (1).

161134753476661 is an equidigital number, since it uses as much as digits as its factorization.

161134753476661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45722880, while the sum is 61.

The spelling of 161134753476661 in words is "one hundred sixty-one trillion, one hundred thirty-four billion, seven hundred fifty-three million, four hundred seventy-six thousand, six hundred sixty-one".