61646234759 has 2 divisors, whose sum is σ = 61646234760. Its totient is φ = 61646234758.

The previous prime is 61646234719. The next prime is 61646234773. The reversal of 61646234759 is 95743264616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61646234759 - 2²⁸ = 61377799303 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61646234759.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61646234719) 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, 30823117379 + 30823117380.

It is an arithmetic number, because the mean of its divisors is an integer number (30823117380).

Almost surely, 2^61646234759 is an apocalyptic number.

61646234759 is a deficient number, since it is larger than the sum of its proper divisors (1).

61646234759 is an equidigital number, since it uses as much as digits as its factorization.

61646234759 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 53.

The spelling of 61646234759 in words is "sixty-one billion, six hundred forty-six million, two hundred thirty-four thousand, seven hundred fifty-nine".