8157855678 has 16 divisors (see below), whose sum is σ = 18646527360. Its totient is φ = 2330815896.

The previous prime is 8157855677. The next prime is 8157855683. The reversal of 8157855678 is 8765587518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8157855677) 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, 97117288 + ... + 97117371.

It is an arithmetic number, because the mean of its divisors is an integer number (1165407960).

Almost surely, 2^8157855678 is an apocalyptic number.

8157855678 is an abundant number, since it is smaller than the sum of its proper divisors (10488671682).

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

8157855678 is a wasteful number, since it uses less digits than its factorization.

8157855678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194234671.

The product of its digits is 18816000, while the sum is 60.

The square root of 8157855678 is about 90320.8485234721. The cubic root of 8157855678 is about 2013.0690537342.

The spelling of 8157855678 in words is "eight billion, one hundred fifty-seven million, eight hundred fifty-five thousand, six hundred seventy-eight".