61347605413 has 2 divisors, whose sum is σ = 61347605414. Its totient is φ = 61347605412.

The previous prime is 61347605411. The next prime is 61347605437. The reversal of 61347605413 is 31450674316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59400413284 + 1947192129 = 243722^2 + 44127^2 .

It is a cyclic number.

It is not a de Polignac number, because 61347605413 - 2¹ = 61347605411 is a prime.

Together with 61347605411, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61347605411) 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, 30673802706 + 30673802707.

It is an arithmetic number, because the mean of its divisors is an integer number (30673802707).

Almost surely, 2^61347605413 is an apocalyptic number.

It is an amenable number.

61347605413 is a deficient number, since it is larger than the sum of its proper divisors (1).

61347605413 is an equidigital number, since it uses as much as digits as its factorization.

61347605413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 61347605413 in words is "sixty-one billion, three hundred forty-seven million, six hundred five thousand, four hundred thirteen".