855188705385 has 32 divisors (see below), whose sum is σ = 1737526260480. Its totient is φ = 390943407744.

The previous prime is 855188705381. The next prime is 855188705453. The reversal of 855188705385 is 583507881558.

855188705385 is a `hidden beast` number, since 8 + 5 + 5 + 18 + 87 + 0 + 538 + 5 = 666.

It is not a de Polignac number, because 855188705385 - 2² = 855188705381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (855188705381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 452479852 + ... + 452481741.

It is an arithmetic number, because the mean of its divisors is an integer number (54297695640).

Almost surely, 2^855188705385 is an apocalyptic number.

It is an amenable number.

855188705385 is an abundant number, since it is smaller than the sum of its proper divisors (882337555095).

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

855188705385 is a wasteful number, since it uses less digits than its factorization.

855188705385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904961614 (or 904961608 counting only the distinct ones).

The product of its (nonzero) digits is 53760000, while the sum is 63.

The spelling of 855188705385 in words is "eight hundred fifty-five billion, one hundred eighty-eight million, seven hundred five thousand, three hundred eighty-five".