78485858687 has 2 divisors, whose sum is σ = 78485858688. Its totient is φ = 78485858686.

The previous prime is 78485858653. The next prime is 78485858713. The reversal of 78485858687 is 78685858487.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78485858687 - 2²⁶ = 78418749823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78485858617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39242929343 + 39242929344.

It is an arithmetic number, because the mean of its divisors is an integer number (39242929344).

Almost surely, 2^78485858687 is an apocalyptic number.

78485858687 is a deficient number, since it is larger than the sum of its proper divisors (1).

78485858687 is an equidigital number, since it uses as much as digits as its factorization.

78485858687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 963379200, while the sum is 74.

The spelling of 78485858687 in words is "seventy-eight billion, four hundred eighty-five million, eight hundred fifty-eight thousand, six hundred eighty-seven".