78656465687 has 2 divisors, whose sum is σ = 78656465688. Its totient is φ = 78656465686.

The previous prime is 78656465653. The next prime is 78656465717.

78656465687 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 78656465687 - 2³⁶ = 9936988951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78656465617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39328232843 + 39328232844.

It is an arithmetic number, because the mean of its divisors is an integer number (39328232844).

Almost surely, 2^78656465687 is an apocalyptic number.

78656465687 is a deficient number, since it is larger than the sum of its proper divisors (1).

78656465687 is an equidigital number, since it uses as much as digits as its factorization.

78656465687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 406425600, while the sum is 68.

The spelling of 78656465687 in words is "seventy-eight billion, six hundred fifty-six million, four hundred sixty-five thousand, six hundred eighty-seven".