74543107729 has 2 divisors, whose sum is σ = 74543107730. Its totient is φ = 74543107728.

The previous prime is 74543107693. The next prime is 74543107753. The reversal of 74543107729 is 92770134547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56668754704 + 17874353025 = 238052^2 + 133695^2 .

It is an emirp because it is prime and its reverse (92770134547) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74543107729 - 2¹⁵ = 74543074961 is a prime.

It is not a weakly prime, because it can be changed into another prime (74543107229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37271553864 + 37271553865.

It is an arithmetic number, because the mean of its divisors is an integer number (37271553865).

Almost surely, 2^74543107729 is an apocalyptic number.

It is an amenable number.

74543107729 is a deficient number, since it is larger than the sum of its proper divisors (1).

74543107729 is an equidigital number, since it uses as much as digits as its factorization.

74543107729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1481760, while the sum is 49.

The spelling of 74543107729 in words is "seventy-four billion, five hundred forty-three million, one hundred seven thousand, seven hundred twenty-nine".