855191478 has 8 divisors (see below), whose sum is σ = 1710382968. Its totient is φ = 285063824.

The previous prime is 855191459. The next prime is 855191483. The reversal of 855191478 is 874191558.

It is a happy number.

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

855191478 is an admirable number.

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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71265951 + ... + 71265962.

It is an arithmetic number, because the mean of its divisors is an integer number (213797871).

Almost surely, 2^855191478 is an apocalyptic number.

855191478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

855191478 is a wasteful number, since it uses less digits than its factorization.

855191478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142531918.

The product of its digits is 403200, while the sum is 48.

The square root of 855191478 is about 29243.6570558472. The cubic root of 855191478 is about 949.1928427490.

The spelling of 855191478 in words is "eight hundred fifty-five million, one hundred ninety-one thousand, four hundred seventy-eight".