61043911297 has 2 divisors, whose sum is σ = 61043911298. Its totient is φ = 61043911296.

The previous prime is 61043911241. The next prime is 61043911307. The reversal of 61043911297 is 79211934016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53232179841 + 7811731456 = 230721^2 + 88384^2 .

It is a cyclic number.

It is not a de Polignac number, because 61043911297 - 2¹¹ = 61043909249 is a prime.

It is not a weakly prime, because it can be changed into another prime (61043911207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30521955648 + 30521955649.

It is an arithmetic number, because the mean of its divisors is an integer number (30521955649).

Almost surely, 2^61043911297 is an apocalyptic number.

It is an amenable number.

61043911297 is a deficient number, since it is larger than the sum of its proper divisors (1).

61043911297 is an equidigital number, since it uses as much as digits as its factorization.

61043911297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 43.

The spelling of 61043911297 in words is "sixty-one billion, forty-three million, nine hundred eleven thousand, two hundred ninety-seven".