61763770729 has 2 divisors, whose sum is σ = 61763770730. Its totient is φ = 61763770728.

The previous prime is 61763770727. The next prime is 61763770769. The reversal of 61763770729 is 92707736716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57674424025 + 4089346704 = 240155^2 + 63948^2 .

It is a cyclic number.

It is not a de Polignac number, because 61763770729 - 2¹ = 61763770727 is a prime.

Together with 61763770727, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 61763770729.

It is not a weakly prime, because it can be changed into another prime (61763770727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30881885364 + 30881885365.

It is an arithmetic number, because the mean of its divisors is an integer number (30881885365).

Almost surely, 2^61763770729 is an apocalyptic number.

It is an amenable number.

61763770729 is a deficient number, since it is larger than the sum of its proper divisors (1).

61763770729 is an equidigital number, since it uses as much as digits as its factorization.

61763770729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4667544, while the sum is 55.

The spelling of 61763770729 in words is "sixty-one billion, seven hundred sixty-three million, seven hundred seventy thousand, seven hundred twenty-nine".