83250778069 has 2 divisors, whose sum is σ = 83250778070. Its totient is φ = 83250778068.

The previous prime is 83250778063. The next prime is 83250778139. The reversal of 83250778069 is 96087705238.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82892168100 + 358609969 = 287910^2 + 18937^2 .

It is a cyclic number.

It is not a de Polignac number, because 83250778069 - 2⁷ = 83250777941 is a prime.

It is a super-2 number, since 2×83250778069² (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 (83250778063) 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, 41625389034 + 41625389035.

It is an arithmetic number, because the mean of its divisors is an integer number (41625389035).

Almost surely, 2^83250778069 is an apocalyptic number.

It is an amenable number.

83250778069 is a deficient number, since it is larger than the sum of its proper divisors (1).

83250778069 is an equidigital number, since it uses as much as digits as its factorization.

83250778069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 83250778069 in words is "eighty-three billion, two hundred fifty million, seven hundred seventy-eight thousand, sixty-nine".