73332143561 has 2 divisors, whose sum is σ = 73332143562. Its totient is φ = 73332143560.

The previous prime is 73332143491. The next prime is 73332143611. The reversal of 73332143561 is 16534123337.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63381083536 + 9951060025 = 251756^2 + 99755^2 .

It is an emirp because it is prime and its reverse (16534123337) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73332143561 - 2¹⁰ = 73332142537 is a prime.

It is a super-2 number, since 2×73332143561² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73332142561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36666071780 + 36666071781.

It is an arithmetic number, because the mean of its divisors is an integer number (36666071781).

Almost surely, 2^73332143561 is an apocalyptic number.

It is an amenable number.

73332143561 is a deficient number, since it is larger than the sum of its proper divisors (1).

73332143561 is an equidigital number, since it uses as much as digits as its factorization.

73332143561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 38.

Adding to 73332143561 its reverse (16534123337), we get a palindrome (89866266898).

The spelling of 73332143561 in words is "seventy-three billion, three hundred thirty-two million, one hundred forty-three thousand, five hundred sixty-one".