8449075861 has 4 divisors (see below), whose sum is σ = 8655150924. Its totient is φ = 8243000800.

The previous prime is 8449075801. The next prime is 8449075927. The reversal of 8449075861 is 1685709448.

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

It can be written as a sum of positive squares in 2 ways, for example, as 493506225 + 7955569636 = 22215^2 + 89194^2 .

It is not a de Polignac number, because 8449075861 - 2¹⁵ = 8449043093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8449075799 and 8449075808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8449075801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103037470 + ... + 103037551.

It is an arithmetic number, because the mean of its divisors is an integer number (2163787731).

Almost surely, 2^8449075861 is an apocalyptic number.

It is an amenable number.

8449075861 is a deficient number, since it is larger than the sum of its proper divisors (206075063).

8449075861 is a wasteful number, since it uses less digits than its factorization.

8449075861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206075062.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The square root of 8449075861 is about 91918.8547633183. The cubic root of 8449075861 is about 2036.7438009573.

The spelling of 8449075861 in words is "eight billion, four hundred forty-nine million, seventy-five thousand, eight hundred sixty-one".