8538172042 has 8 divisors (see below), whose sum is σ = 12811047300. Its totient is φ = 4267822944.

The previous prime is 8538172039. The next prime is 8538172099. The reversal of 8538172042 is 2402718358.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8157883041 + 380289001 = 90321^2 + 19501^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 8538171986 and 8538172004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623067 + ... + 636622.

Almost surely, 2^8538172042 is an apocalyptic number.

8538172042 is a deficient number, since it is larger than the sum of its proper divisors (4272875258).

8538172042 is a wasteful number, since it uses less digits than its factorization.

8538172042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263080.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 8538172042 is about 92402.2296376013. The cubic root of 8538172042 is about 2043.8779913271.

The spelling of 8538172042 in words is "eight billion, five hundred thirty-eight million, one hundred seventy-two thousand, forty-two".