61047314821 has 2 divisors, whose sum is σ = 61047314822. Its totient is φ = 61047314820.

The previous prime is 61047314753. The next prime is 61047314827. The reversal of 61047314821 is 12841374016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52814474596 + 8232840225 = 229814^2 + 90735^2 .

It is a cyclic number.

It is not a de Polignac number, because 61047314821 - 2²³ = 61038926213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61047314827) 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, 30523657410 + 30523657411.

It is an arithmetic number, because the mean of its divisors is an integer number (30523657411).

Almost surely, 2^61047314821 is an apocalyptic number.

It is an amenable number.

61047314821 is a deficient number, since it is larger than the sum of its proper divisors (1).

61047314821 is an equidigital number, since it uses as much as digits as its factorization.

61047314821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 37.

Adding to 61047314821 its reverse (12841374016), we get a palindrome (73888688837).

The spelling of 61047314821 in words is "sixty-one billion, forty-seven million, three hundred fourteen thousand, eight hundred twenty-one".