78384046878 has 24 divisors (see below), whose sum is σ = 170226160416. Its totient is φ = 26067391200.

The previous prime is 78384046877. The next prime is 78384046919. The reversal of 78384046878 is 87864048387.

78384046878 is a `hidden beast` number, since 78 + 38 + 4 + 0 + 468 + 78 = 666.

It is a super-2 number, since 2×78384046878² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78384046877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5044063 + ... + 5059578.

It is an arithmetic number, because the mean of its divisors is an integer number (7092756684).

Almost surely, 2^78384046878 is an apocalyptic number.

78384046878 is an abundant number, since it is smaller than the sum of its proper divisors (91842113538).

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

78384046878 is a wasteful number, since it uses less digits than its factorization.

78384046878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10104080 (or 10104077 counting only the distinct ones).

The product of its (nonzero) digits is 57802752, while the sum is 63.

The spelling of 78384046878 in words is "seventy-eight billion, three hundred eighty-four million, forty-six thousand, eight hundred seventy-eight".