61263300281 has 2 divisors, whose sum is σ = 61263300282. Its totient is φ = 61263300280.

The previous prime is 61263300277. The next prime is 61263300337. The reversal of 61263300281 is 18200336216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60969486400 + 293813881 = 246920^2 + 17141^2 .

It is a cyclic number.

It is not a de Polignac number, because 61263300281 - 2² = 61263300277 is a prime.

It is a super-2 number, since 2×61263300281² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61263300211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30631650140 + 30631650141.

It is an arithmetic number, because the mean of its divisors is an integer number (30631650141).

Almost surely, 2^61263300281 is an apocalyptic number.

It is an amenable number.

61263300281 is a deficient number, since it is larger than the sum of its proper divisors (1).

61263300281 is an equidigital number, since it uses as much as digits as its factorization.

61263300281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

Adding to 61263300281 its reverse (18200336216), we get a palindrome (79463636497).

The spelling of 61263300281 in words is "sixty-one billion, two hundred sixty-three million, three hundred thousand, two hundred eighty-one".