78585795437 has 2 divisors, whose sum is σ = 78585795438. Its totient is φ = 78585795436.

The previous prime is 78585795413. The next prime is 78585795439. The reversal of 78585795437 is 73459758587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46437664036 + 32148131401 = 215494^2 + 179299^2 .

It is a cyclic number.

It is not a de Polignac number, because 78585795437 - 2¹⁴ = 78585779053 is a prime.

Together with 78585795439, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78585795439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39292897718 + 39292897719.

It is an arithmetic number, because the mean of its divisors is an integer number (39292897719).

Almost surely, 2^78585795437 is an apocalyptic number.

It is an amenable number.

78585795437 is a deficient number, since it is larger than the sum of its proper divisors (1).

78585795437 is an equidigital number, since it uses as much as digits as its factorization.

78585795437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352000, while the sum is 68.

The spelling of 78585795437 in words is "seventy-eight billion, five hundred eighty-five million, seven hundred ninety-five thousand, four hundred thirty-seven".