855804534 has 64 divisors (see below), whose sum is σ = 1894281984. Its totient is φ = 256139136.

The previous prime is 855804527. The next prime is 855804541. The reversal of 855804534 is 435408558.

It is an interprime number because it is at equal distance from previous prime (855804527) and next prime (855804541).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 432772 + ... + 434744.

It is an arithmetic number, because the mean of its divisors is an integer number (29598156).

Almost surely, 2^855804534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 855804534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (947140992).

855804534 is an abundant number, since it is smaller than the sum of its proper divisors (1038477450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

855804534 is a wasteful number, since it uses less digits than its factorization.

855804534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141.

The product of its (nonzero) digits is 384000, while the sum is 42.

The square root of 855804534 is about 29254.1370407674. The cubic root of 855804534 is about 949.4196026376.

The spelling of 855804534 in words is "eight hundred fifty-five million, eight hundred four thousand, five hundred thirty-four".