855910109 has 8 divisors (see below), whose sum is σ = 908262720. Its totient is φ = 804819136.

The previous prime is 855910049. The next prime is 855910163. The reversal of 855910109 is 901019558.

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

It is a cyclic number.

It is not a de Polignac number, because 855910109 - 2²⁸ = 587474653 is a prime.

It is a super-2 number, since 2×855910109² = 1465164229376783762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855910009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314012 + ... + 316725.

It is an arithmetic number, because the mean of its divisors is an integer number (113532840).

Almost surely, 2^855910109 is an apocalyptic number.

It is an amenable number.

855910109 is a deficient number, since it is larger than the sum of its proper divisors (52352611).

855910109 is a wasteful number, since it uses less digits than its factorization.

855910109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630819.

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 855910109 is about 29255.9414307590. The cubic root of 855910109 is about 949.4586422583.

The spelling of 855910109 in words is "eight hundred fifty-five million, nine hundred ten thousand, one hundred nine".