8501779906 has 4 divisors (see below), whose sum is σ = 12752669862. Its totient is φ = 4250889952.

The previous prime is 8501779903. The next prime is 8501779907. The reversal of 8501779906 is 6099771058.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8435504025 + 66275881 = 91845^2 + 8141^2 .

It is not an unprimeable number, because it can be changed into a prime (8501779903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2125444975 + ... + 2125444978.

Almost surely, 2^8501779906 is an apocalyptic number.

8501779906 is a deficient number, since it is larger than the sum of its proper divisors (4250889956).

8501779906 is a wasteful number, since it uses less digits than its factorization.

8501779906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4250889955.

The product of its (nonzero) digits is 952560, while the sum is 52.

The square root of 8501779906 is about 92205.0969632373. The cubic root of 8501779906 is about 2040.9699912600.

The spelling of 8501779906 in words is "eight billion, five hundred one million, seven hundred seventy-nine thousand, nine hundred six".