8378434854 has 16 divisors (see below), whose sum is σ = 18618744240. Its totient is φ = 2792811600.

The previous prime is 8378434817. The next prime is 8378434859. The reversal of 8378434854 is 4584348738.

8378434854 is a `hidden beast` number, since 83 + 7 + 84 + 3 + 485 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 155156201 = 8378434854 / (8 + 3 + 7 + 8 + 4 + 3 + 4 + 8 + 5 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 8378434854.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8378434859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77578047 + ... + 77578154.

It is an arithmetic number, because the mean of its divisors is an integer number (1163671515).

Almost surely, 2^8378434854 is an apocalyptic number.

8378434854 is an abundant number, since it is smaller than the sum of its proper divisors (10240309386).

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

8378434854 is a wasteful number, since it uses less digits than its factorization.

8378434854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155156212 (or 155156206 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 54.

The square root of 8378434854 is about 91533.7907769584. The cubic root of 8378434854 is about 2031.0516406298.

The spelling of 8378434854 in words is "eight billion, three hundred seventy-eight million, four hundred thirty-four thousand, eight hundred fifty-four".