61309554019429 has 2 divisors, whose sum is σ = 61309554019430. Its totient is φ = 61309554019428.

The previous prime is 61309554019367. The next prime is 61309554019499. The reversal of 61309554019429 is 92491045590316.

It is a happy number.

61309554019429 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., 43380638614404 + 17928915405025 = 6586398^2 + 4234255^2 .

It is a cyclic number.

It is not a de Polignac number, because 61309554019429 - 2¹¹ = 61309554017381 is a prime.

It is a super-2 number, since 2×61309554019429² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61309554019499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30654777009714 + 30654777009715.

It is an arithmetic number, because the mean of its divisors is an integer number (30654777009715).

Almost surely, 2^{61309554019429} is an apocalyptic number.

It is an amenable number.

61309554019429 is a deficient number, since it is larger than the sum of its proper divisors (1).

61309554019429 is an equidigital number, since it uses as much as digits as its factorization.

61309554019429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10497600, while the sum is 58.

The spelling of 61309554019429 in words is "sixty-one trillion, three hundred nine billion, five hundred fifty-four million, nineteen thousand, four hundred twenty-nine".