8178386434 has 16 divisors (see below), whose sum is σ = 12764988288. Its totient is φ = 3926673712.

The previous prime is 8178386431. The next prime is 8178386477. The reversal of 8178386434 is 4346838718.

It is not an unprimeable number, because it can be changed into a prime (8178386431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 815812 + ... + 825775.

It is an arithmetic number, because the mean of its divisors is an integer number (797811768).

Almost surely, 2^8178386434 is an apocalyptic number.

8178386434 is a deficient number, since it is larger than the sum of its proper divisors (4586601854).

8178386434 is a wasteful number, since it uses less digits than its factorization.

8178386434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641689.

The product of its digits is 3096576, while the sum is 52.

The square root of 8178386434 is about 90434.4316839554. The cubic root of 8178386434 is about 2014.7563928335.

The spelling of 8178386434 in words is "eight billion, one hundred seventy-eight million, three hundred eighty-six thousand, four hundred thirty-four".