61257279283247 has 2 divisors, whose sum is σ = 61257279283248. Its totient is φ = 61257279283246.

The previous prime is 61257279283199. The next prime is 61257279283253. The reversal of 61257279283247 is 74238297275216.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61257279283247 - 2¹⁰ = 61257279282223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61257279282247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30628639641623 + 30628639641624.

It is an arithmetic number, because the mean of its divisors is an integer number (30628639641624).

Almost surely, 2^{61257279283247} is an apocalyptic number.

61257279283247 is a deficient number, since it is larger than the sum of its proper divisors (1).

61257279283247 is an equidigital number, since it uses as much as digits as its factorization.

61257279283247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142248960, while the sum is 65.

The spelling of 61257279283247 in words is "sixty-one trillion, two hundred fifty-seven billion, two hundred seventy-nine million, two hundred eighty-three thousand, two hundred forty-seven".