61466642731553 has 2 divisors, whose sum is σ = 61466642731554. Its totient is φ = 61466642731552.

The previous prime is 61466642731519. The next prime is 61466642731633. The reversal of 61466642731553 is 35513724666416.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45051642050704 + 16415000680849 = 6712052^2 + 4051543^2 .

It is a cyclic number.

It is not a de Polignac number, because 61466642731553 - 2⁶ = 61466642731489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61466642731492 and 61466642731501.

It is not a weakly prime, because it can be changed into another prime (61466642731853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30733321365776 + 30733321365777.

It is an arithmetic number, because the mean of its divisors is an integer number (30733321365777).

Almost surely, 2^{61466642731553} is an apocalyptic number.

It is an amenable number.

61466642731553 is a deficient number, since it is larger than the sum of its proper divisors (1).

61466642731553 is an equidigital number, since it uses as much as digits as its factorization.

61466642731553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65318400, while the sum is 59.

The spelling of 61466642731553 in words is "sixty-one trillion, four hundred sixty-six billion, six hundred forty-two million, seven hundred thirty-one thousand, five hundred fifty-three".