78865256888 has 16 divisors (see below), whose sum is σ = 161315298360. Its totient is φ = 35847844000.

The previous prime is 78865256881. The next prime is 78865256909. The reversal of 78865256888 is 88865256887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78865256881) 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, 448097963 + ... + 448098138.

Almost surely, 2^78865256888 is an apocalyptic number.

It is an amenable number.

78865256888 is an abundant number, since it is smaller than the sum of its proper divisors (82450041472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78865256888 is a wasteful number, since it uses less digits than its factorization.

78865256888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896196118 (or 896196114 counting only the distinct ones).

The product of its digits is 412876800, while the sum is 71.

Subtracting 78865256888 from its reverse (88865256887), we obtain a palindrome (9999999999).

The spelling of 78865256888 in words is "seventy-eight billion, eight hundred sixty-five million, two hundred fifty-six thousand, eight hundred eighty-eight".