78281049029 has 2 divisors, whose sum is σ = 78281049030. Its totient is φ = 78281049028.

The previous prime is 78281049017. The next prime is 78281049043. The reversal of 78281049029 is 92094018287.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51301344004 + 26979705025 = 226498^2 + 164255^2 .

It is a cyclic number.

It is not a de Polignac number, because 78281049029 - 2¹⁶ = 78280983493 is a prime.

It is a super-2 number, since 2×78281049029² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78281049629) 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, 39140524514 + 39140524515.

It is an arithmetic number, because the mean of its divisors is an integer number (39140524515).

Almost surely, 2^78281049029 is an apocalyptic number.

It is an amenable number.

78281049029 is a deficient number, since it is larger than the sum of its proper divisors (1).

78281049029 is an equidigital number, since it uses as much as digits as its factorization.

78281049029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 50.

The spelling of 78281049029 in words is "seventy-eight billion, two hundred eighty-one million, forty-nine thousand, twenty-nine".