855809481 has 8 divisors (see below), whose sum is σ = 1143263200. Its totient is φ = 569447712.

The previous prime is 855809477. The next prime is 855809491. The reversal of 855809481 is 184908558.

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

It is not a de Polignac number, because 855809481 - 2² = 855809477 is a prime.

It is a super-2 number, since 2×855809481² = 1464819735538978722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 855809481.

It is not an unprimeable number, because it can be changed into a prime (855809491) 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, 271156 + ... + 274293.

It is an arithmetic number, because the mean of its divisors is an integer number (142907900).

Almost surely, 2^855809481 is an apocalyptic number.

It is an amenable number.

855809481 is a deficient number, since it is larger than the sum of its proper divisors (287453719).

855809481 is a wasteful number, since it uses less digits than its factorization.

855809481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545975.

The product of its (nonzero) digits is 460800, while the sum is 48.

The square root of 855809481 is about 29254.2215927890. The cubic root of 855809481 is about 949.4214320155.

The spelling of 855809481 in words is "eight hundred fifty-five million, eight hundred nine thousand, four hundred eighty-one".