61330567829 has 2 divisors, whose sum is σ = 61330567830. Its totient is φ = 61330567828.

The previous prime is 61330567747. The next prime is 61330567889. The reversal of 61330567829 is 92876503316.

61330567829 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32668755025 + 28661812804 = 180745^2 + 169298^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61330567829 is a prime.

It is a super-2 number, since 2×61330567829² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61330567889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30665283914 + 30665283915.

It is an arithmetic number, because the mean of its divisors is an integer number (30665283915).

Almost surely, 2^61330567829 is an apocalyptic number.

It is an amenable number.

61330567829 is a deficient number, since it is larger than the sum of its proper divisors (1).

61330567829 is an equidigital number, since it uses as much as digits as its factorization.

61330567829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 61330567829 in words is "sixty-one billion, three hundred thirty million, five hundred sixty-seven thousand, eight hundred twenty-nine".