61364674475449 has 2 divisors, whose sum is σ = 61364674475450. Its totient is φ = 61364674475448.

The previous prime is 61364674475443. The next prime is 61364674475477. The reversal of 61364674475449 is 94457447646316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60906708275625 + 457966199824 = 7804275^2 + 676732^2 .

It is a cyclic number.

It is not a de Polignac number, because 61364674475449 - 2⁹ = 61364674474937 is a prime.

It is not a weakly prime, because it can be changed into another prime (61364674475443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30682337237724 + 30682337237725.

It is an arithmetic number, because the mean of its divisors is an integer number (30682337237725).

Almost surely, 2^{61364674475449} is an apocalyptic number.

It is an amenable number.

61364674475449 is a deficient number, since it is larger than the sum of its proper divisors (1).

61364674475449 is an equidigital number, since it uses as much as digits as its factorization.

61364674475449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1463132160, while the sum is 70.

The spelling of 61364674475449 in words is "sixty-one trillion, three hundred sixty-four billion, six hundred seventy-four million, four hundred seventy-five thousand, four hundred forty-nine".