8638772418 has 64 divisors (see below), whose sum is σ = 20190643200. Its totient is φ = 2734093440.

The previous prime is 8638772407. The next prime is 8638772509. The reversal of 8638772418 is 8142778368.

It is a happy number.

8638772418 is a `hidden beast` number, since 86 + 3 + 87 + 72 + 418 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40038 + ... + 137406.

It is an arithmetic number, because the mean of its divisors is an integer number (315478800).

Almost surely, 2^8638772418 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8638772418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10095321600).

8638772418 is an abundant number, since it is smaller than the sum of its proper divisors (11551870782).

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

8638772418 is a wasteful number, since it uses less digits than its factorization.

8638772418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97464 (or 97458 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 54.

The square root of 8638772418 is about 92944.9967346279. The cubic root of 8638772418 is about 2051.8739492011.

The spelling of 8638772418 in words is "eight billion, six hundred thirty-eight million, seven hundred seventy-two thousand, four hundred eighteen".