8673121642 has 32 divisors (see below), whose sum is σ = 14043453840. Its totient is φ = 4002324480.

The previous prime is 8673121631. The next prime is 8673121649. The reversal of 8673121642 is 2461213768.

It can be written as a sum of positive squares in 8 ways, for example, as 346741641 + 8326380001 = 18621^2 + 91249^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8673121595 and 8673121604.

It is not an unprimeable number, because it can be changed into a prime (8673121649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 692734 + ... + 705142.

Almost surely, 2^8673121642 is an apocalyptic number.

8673121642 is a deficient number, since it is larger than the sum of its proper divisors (5370332198).

8673121642 is a wasteful number, since it uses less digits than its factorization.

8673121642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12826.

The product of its digits is 96768, while the sum is 40.

The square root of 8673121642 is about 93129.5959510187. The cubic root of 8673121642 is about 2054.5898856194.

The spelling of 8673121642 in words is "eight billion, six hundred seventy-three million, one hundred twenty-one thousand, six hundred forty-two".