65561547744001 has 2 divisors, whose sum is σ = 65561547744002. Its totient is φ = 65561547744000.

The previous prime is 65561547743959. The next prime is 65561547744037. The reversal of 65561547744001 is 10044774516556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65310723065025 + 250824678976 = 8081505^2 + 500824^2 .

It is a cyclic number.

It is not a de Polignac number, because 65561547744001 - 2²⁵ = 65561514189569 is a prime.

It is a super-2 number, since 2×65561547744001² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65561547714001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32780773872000 + 32780773872001.

It is an arithmetic number, because the mean of its divisors is an integer number (32780773872001).

Almost surely, 2^{65561547744001} is an apocalyptic number.

It is an amenable number.

65561547744001 is a deficient number, since it is larger than the sum of its proper divisors (1).

65561547744001 is an equidigital number, since it uses as much as digits as its factorization.

65561547744001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112000, while the sum is 55.

The spelling of 65561547744001 in words is "sixty-five trillion, five hundred sixty-one billion, five hundred forty-seven million, seven hundred forty-four thousand, one".