8949180978638 has 16 divisors (see below), whose sum is σ = 13434256668336. Its totient is φ = 4471096069440.

The previous prime is 8949180978637. The next prime is 8949180978659. The reversal of 8949180978638 is 8368790819498.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8949180978637) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 28498370 + ... + 28810682.

It is an arithmetic number, because the mean of its divisors is an integer number (839641041771).

Almost surely, 2^{8949180978638} is an apocalyptic number.

8949180978638 is a deficient number, since it is larger than the sum of its proper divisors (4485075689698).

8949180978638 is a wasteful number, since it uses less digits than its factorization.

8949180978638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323459.

The product of its (nonzero) digits is 1504935936, while the sum is 80.

The spelling of 8949180978638 in words is "eight trillion, nine hundred forty-nine billion, one hundred eighty million, nine hundred seventy-eight thousand, six hundred thirty-eight".