78236063687 has 2 divisors, whose sum is σ = 78236063688. Its totient is φ = 78236063686.

The previous prime is 78236063669. The next prime is 78236063723. The reversal of 78236063687 is 78636063287.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78236063687 - 2¹⁴ = 78236047303 is a prime.

It is a super-2 number, since 2×78236063687² (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 (78236060687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39118031843 + 39118031844.

It is an arithmetic number, because the mean of its divisors is an integer number (39118031844).

Almost surely, 2^78236063687 is an apocalyptic number.

78236063687 is a deficient number, since it is larger than the sum of its proper divisors (1).

78236063687 is an equidigital number, since it uses as much as digits as its factorization.

78236063687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12192768, while the sum is 56.

The spelling of 78236063687 in words is "seventy-eight billion, two hundred thirty-six million, sixty-three thousand, six hundred eighty-seven".