855012384978 has 32 divisors (see below), whose sum is σ = 1739877826560. Its totient is φ = 280062815760.

The previous prime is 855012384977. The next prime is 855012385013. The reversal of 855012384978 is 879483210558.

It is not an unprimeable number, because it can be changed into a prime (855012384977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4174450 + ... + 4374477.

It is an arithmetic number, because the mean of its divisors is an integer number (54371182080).

Almost surely, 2^855012384978 is an apocalyptic number.

855012384978 is an abundant number, since it is smaller than the sum of its proper divisors (884865441582).

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

855012384978 is a wasteful number, since it uses less digits than its factorization.

855012384978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8549222.

The product of its (nonzero) digits is 19353600, while the sum is 60.

The spelling of 855012384978 in words is "eight hundred fifty-five billion, twelve million, three hundred eighty-four thousand, nine hundred seventy-eight".