61310553641 has 2 divisors, whose sum is σ = 61310553642. Its totient is φ = 61310553640.

The previous prime is 61310553613. The next prime is 61310553679. The reversal of 61310553641 is 14635501316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44202960025 + 17107593616 = 210245^2 + 130796^2 .

It is a cyclic number.

It is not a de Polignac number, because 61310553641 - 2¹⁰ = 61310552617 is a prime.

It is not a weakly prime, because it can be changed into another prime (61310553341) 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, 30655276820 + 30655276821.

It is an arithmetic number, because the mean of its divisors is an integer number (30655276821).

Almost surely, 2^61310553641 is an apocalyptic number.

It is an amenable number.

61310553641 is a deficient number, since it is larger than the sum of its proper divisors (1).

61310553641 is an equidigital number, since it uses as much as digits as its factorization.

61310553641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 61310553641 in words is "sixty-one billion, three hundred ten million, five hundred fifty-three thousand, six hundred forty-one".