61681051559 has 2 divisors, whose sum is σ = 61681051560. Its totient is φ = 61681051558.

The previous prime is 61681051529. The next prime is 61681051589. The reversal of 61681051559 is 95515018616.

It is a balanced prime because it is at equal distance from previous prime (61681051529) and next prime (61681051589).

It is a cyclic number.

It is not a de Polignac number, because 61681051559 - 2⁸ = 61681051303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61681051529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30840525779 + 30840525780.

It is an arithmetic number, because the mean of its divisors is an integer number (30840525780).

Almost surely, 2^61681051559 is an apocalyptic number.

61681051559 is a deficient number, since it is larger than the sum of its proper divisors (1).

61681051559 is an equidigital number, since it uses as much as digits as its factorization.

61681051559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324000, while the sum is 47.

The spelling of 61681051559 in words is "sixty-one billion, six hundred eighty-one million, fifty-one thousand, five hundred fifty-nine".