61044278159 has 2 divisors, whose sum is σ = 61044278160. Its totient is φ = 61044278158.

The previous prime is 61044278137. The next prime is 61044278189. The reversal of 61044278159 is 95187244016.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61044278159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61044278189) 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, 30522139079 + 30522139080.

It is an arithmetic number, because the mean of its divisors is an integer number (30522139080).

Almost surely, 2^61044278159 is an apocalyptic number.

61044278159 is a deficient number, since it is larger than the sum of its proper divisors (1).

61044278159 is an equidigital number, since it uses as much as digits as its factorization.

61044278159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 61044278159 in words is "sixty-one billion, forty-four million, two hundred seventy-eight thousand, one hundred fifty-nine".