78284455868 has 24 divisors (see below), whose sum is σ = 141563541504. Its totient is φ = 37840345200.

The previous prime is 78284455849. The next prime is 78284455871. The reversal of 78284455868 is 86855448287.

It is a super-2 number, since 2×78284455868² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206528 + ... + 446343.

It is an arithmetic number, because the mean of its divisors is an integer number (5898480896).

Almost surely, 2^78284455868 is an apocalyptic number.

It is an amenable number.

78284455868 is a deficient number, since it is larger than the sum of its proper divisors (63279085636).

78284455868 is a wasteful number, since it uses less digits than its factorization.

78284455868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653873 (or 653871 counting only the distinct ones).

The product of its digits is 137625600, while the sum is 65.

The spelling of 78284455868 in words is "seventy-eight billion, two hundred eighty-four million, four hundred fifty-five thousand, eight hundred sixty-eight".