61579347859 has 2 divisors, whose sum is σ = 61579347860. Its totient is φ = 61579347858.

The previous prime is 61579347847. The next prime is 61579347923. The reversal of 61579347859 is 95874397516.

It is an a-pointer prime, because the next prime (61579347923) can be obtained adding 61579347859 to its sum of digits (64).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61579347859 - 2¹³ = 61579339667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61579347859.

It is not a weakly prime, because it can be changed into another prime (61579347829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30789673929 + 30789673930.

It is an arithmetic number, because the mean of its divisors is an integer number (30789673930).

Almost surely, 2^61579347859 is an apocalyptic number.

61579347859 is a deficient number, since it is larger than the sum of its proper divisors (1).

61579347859 is an equidigital number, since it uses as much as digits as its factorization.

61579347859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57153600, while the sum is 64.

The spelling of 61579347859 in words is "sixty-one billion, five hundred seventy-nine million, three hundred forty-seven thousand, eight hundred fifty-nine".