8642473892 has 24 divisors (see below), whose sum is σ = 16325397816. Its totient is φ = 3979611648.

The previous prime is 8642473811. The next prime is 8642473909. The reversal of 8642473892 is 2983742468.

It can be written as a sum of positive squares in 4 ways, for example, as 887205796 + 7755268096 = 29786^2 + 88064^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169403 + ... + 214434.

It is an arithmetic number, because the mean of its divisors is an integer number (680224909).

Almost surely, 2^8642473892 is an apocalyptic number.

It is an amenable number.

8642473892 is a deficient number, since it is larger than the sum of its proper divisors (7682923924).

8642473892 is a wasteful number, since it uses less digits than its factorization.

8642473892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384287 (or 384285 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 53.

The square root of 8642473892 is about 92964.9067766972. The cubic root of 8642473892 is about 2052.1669643512.

The spelling of 8642473892 in words is "eight billion, six hundred forty-two million, four hundred seventy-three thousand, eight hundred ninety-two".