78287914687 has 2 divisors, whose sum is σ = 78287914688. Its totient is φ = 78287914686.

The previous prime is 78287914669. The next prime is 78287914729. The reversal of 78287914687 is 78641978287.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78287914687 is a prime.

It is a super-2 number, since 2×78287914687² (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 (78287914637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39143957343 + 39143957344.

It is an arithmetic number, because the mean of its divisors is an integer number (39143957344).

Almost surely, 2^78287914687 is an apocalyptic number.

78287914687 is a deficient number, since it is larger than the sum of its proper divisors (1).

78287914687 is an equidigital number, since it uses as much as digits as its factorization.

78287914687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75866112, while the sum is 67.

The spelling of 78287914687 in words is "seventy-eight billion, two hundred eighty-seven million, nine hundred fourteen thousand, six hundred eighty-seven".