78206518037 has 2 divisors, whose sum is σ = 78206518038. Its totient is φ = 78206518036.

The previous prime is 78206517989. The next prime is 78206518057. The reversal of 78206518037 is 73081560287.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74645889796 + 3560628241 = 273214^2 + 59671^2 .

It is a cyclic number.

It is not a de Polignac number, because 78206518037 - 2¹⁸ = 78206255893 is a prime.

It is a super-2 number, since 2×78206518037² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78206517982 and 78206518000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78206518057) 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, 39103259018 + 39103259019.

It is an arithmetic number, because the mean of its divisors is an integer number (39103259019).

Almost surely, 2^78206518037 is an apocalyptic number.

It is an amenable number.

78206518037 is a deficient number, since it is larger than the sum of its proper divisors (1).

78206518037 is an equidigital number, since it uses as much as digits as its factorization.

78206518037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 564480, while the sum is 47.

The spelling of 78206518037 in words is "seventy-eight billion, two hundred six million, five hundred eighteen thousand, thirty-seven".