78236463287 has 4 divisors (see below), whose sum is σ = 78237176280. Its totient is φ = 78235750296.

The previous prime is 78236463271. The next prime is 78236463293.

78236463287 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 78236463287 - 2⁴ = 78236463271 is a prime.

It is a super-2 number, since 2×78236463287² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78236463587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153293 + ... + 424230.

It is an arithmetic number, because the mean of its divisors is an integer number (19559294070).

Almost surely, 2^78236463287 is an apocalyptic number.

78236463287 is a deficient number, since it is larger than the sum of its proper divisors (712993).

78236463287 is a wasteful number, since it uses less digits than its factorization.

78236463287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712992.

The product of its digits is 16257024, while the sum is 56.

The spelling of 78236463287 in words is "seventy-eight billion, two hundred thirty-six million, four hundred sixty-three thousand, two hundred eighty-seven".