61452505729 has 2 divisors, whose sum is σ = 61452505730. Its totient is φ = 61452505728.

The previous prime is 61452505703. The next prime is 61452505757. The reversal of 61452505729 is 92750525416.

61452505729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39949216129 + 21503289600 = 199873^2 + 146640^2 .

It is a cyclic number.

It is not a de Polignac number, because 61452505729 - 2¹⁹ = 61451981441 is a prime.

It is not a weakly prime, because it can be changed into another prime (61452508729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30726252864 + 30726252865.

It is an arithmetic number, because the mean of its divisors is an integer number (30726252865).

Almost surely, 2^61452505729 is an apocalyptic number.

It is an amenable number.

61452505729 is a deficient number, since it is larger than the sum of its proper divisors (1).

61452505729 is an equidigital number, since it uses as much as digits as its factorization.

61452505729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756000, while the sum is 46.

The spelling of 61452505729 in words is "sixty-one billion, four hundred fifty-two million, five hundred five thousand, seven hundred twenty-nine".