8615809394 has 4 divisors (see below), whose sum is σ = 12923714094. Its totient is φ = 4307904696.

The previous prime is 8615809393. The next prime is 8615809399. The reversal of 8615809394 is 4939085168.

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., 8610912025 + 4897369 = 92795^2 + 2213^2 .

It is not an unprimeable number, because it can be changed into a prime (8615809393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2153952347 + ... + 2153952350.

Almost surely, 2^8615809394 is an apocalyptic number.

8615809394 is a deficient number, since it is larger than the sum of its proper divisors (4307904700).

8615809394 is a wasteful number, since it uses less digits than its factorization.

8615809394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4307904699.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The square root of 8615809394 is about 92821.3843572697. The cubic root of 8615809394 is about 2050.0542832344.

The spelling of 8615809394 in words is "eight billion, six hundred fifteen million, eight hundred nine thousand, three hundred ninety-four".