61843535297 has 2 divisors, whose sum is σ = 61843535298. Its totient is φ = 61843535296.

The previous prime is 61843535291. The next prime is 61843535381. The reversal of 61843535297 is 79253534816.

It is a happy number.

61843535297 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31712130241 + 30131405056 = 178079^2 + 173584^2 .

It is a cyclic number.

It is not a de Polignac number, because 61843535297 - 2²⁶ = 61776426433 is a prime.

It is not a weakly prime, because it can be changed into another prime (61843535291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30921767648 + 30921767649.

It is an arithmetic number, because the mean of its divisors is an integer number (30921767649).

Almost surely, 2^61843535297 is an apocalyptic number.

It is an amenable number.

61843535297 is a deficient number, since it is larger than the sum of its proper divisors (1).

61843535297 is an equidigital number, since it uses as much as digits as its factorization.

61843535297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5443200, while the sum is 53.

The spelling of 61843535297 in words is "sixty-one billion, eight hundred forty-three million, five hundred thirty-five thousand, two hundred ninety-seven".