78778462284 has 18 divisors (see below), whose sum is σ = 199134446420. Its totient is φ = 26259487416.

The previous prime is 78778462249. The next prime is 78778462303. The reversal of 78778462284 is 48226487787.

78778462284 is a `hidden beast` number, since 7 + 87 + 78 + 462 + 28 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×78778462284² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1094145274 + ... + 1094145345.

Almost surely, 2^78778462284 is an apocalyptic number.

It is an amenable number.

78778462284 is an abundant number, since it is smaller than the sum of its proper divisors (120355984136).

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

78778462284 is a wasteful number, since it uses less digits than its factorization.

78778462284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188290629 (or 2188290624 counting only the distinct ones).

The product of its digits is 67436544, while the sum is 63.

The spelling of 78778462284 in words is "seventy-eight billion, seven hundred seventy-eight million, four hundred sixty-two thousand, two hundred eighty-four".