61281260233 has 2 divisors, whose sum is σ = 61281260234. Its totient is φ = 61281260232.

The previous prime is 61281260231. The next prime is 61281260263. The reversal of 61281260233 is 33206218216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51081876169 + 10199384064 = 226013^2 + 100992^2 .

It is a cyclic number.

It is not a de Polignac number, because 61281260233 - 2¹ = 61281260231 is a prime.

Together with 61281260231, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61281260231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30640630116 + 30640630117.

It is an arithmetic number, because the mean of its divisors is an integer number (30640630117).

Almost surely, 2^61281260233 is an apocalyptic number.

It is an amenable number.

61281260233 is a deficient number, since it is larger than the sum of its proper divisors (1).

61281260233 is an equidigital number, since it uses as much as digits as its factorization.

61281260233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

Adding to 61281260233 its reverse (33206218216), we get a palindrome (94487478449).

The spelling of 61281260233 in words is "sixty-one billion, two hundred eighty-one million, two hundred sixty thousand, two hundred thirty-three".