61536644579 has 2 divisors, whose sum is σ = 61536644580. Its totient is φ = 61536644578.

The previous prime is 61536644563. The next prime is 61536644623. The reversal of 61536644579 is 97544663516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61536644579 - 2⁴ = 61536644563 is a prime.

It is not a weakly prime, because it can be changed into another prime (61536644179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30768322289 + 30768322290.

It is an arithmetic number, because the mean of its divisors is an integer number (30768322290).

Almost surely, 2^61536644579 is an apocalyptic number.

61536644579 is a deficient number, since it is larger than the sum of its proper divisors (1).

61536644579 is an equidigital number, since it uses as much as digits as its factorization.

61536644579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16329600, while the sum is 56.

The spelling of 61536644579 in words is "sixty-one billion, five hundred thirty-six million, six hundred forty-four thousand, five hundred seventy-nine".