8557855109 has 4 divisors (see below), whose sum is σ = 8585372640. Its totient is φ = 8530337580.

The previous prime is 8557855091. The next prime is 8557855121. The reversal of 8557855109 is 9015587558.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8557855109 - 2⁸ = 8557854853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8557855169) 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, 13758299 + ... + 13758920.

It is an arithmetic number, because the mean of its divisors is an integer number (2146343160).

Almost surely, 2^8557855109 is an apocalyptic number.

It is an amenable number.

8557855109 is a deficient number, since it is larger than the sum of its proper divisors (27517531).

8557855109 is a wasteful number, since it uses less digits than its factorization.

8557855109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27517530.

The product of its (nonzero) digits is 2520000, while the sum is 53.

The square root of 8557855109 is about 92508.6758579972. The cubic root of 8557855109 is about 2045.4473714723.

The spelling of 8557855109 in words is "eight billion, five hundred fifty-seven million, eight hundred fifty-five thousand, one hundred nine".