8155686144 has 72 divisors (see below), whose sum is σ = 22003512832. Its totient is φ = 2681303040.

The previous prime is 8155686109. The next prime is 8155686167. The reversal of 8155686144 is 4416865518.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 8155686093 and 8155686102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16672 + ... + 128799.

Almost surely, 2^8155686144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8155686144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11001756416).

8155686144 is an abundant number, since it is smaller than the sum of its proper divisors (13847826688).

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

8155686144 is a wasteful number, since it uses less digits than its factorization.

8155686144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145563 (or 145549 counting only the distinct ones).

The product of its digits is 921600, while the sum is 48.

The square root of 8155686144 is about 90308.8375741821. The cubic root of 8155686144 is about 2012.8905832656.

The spelling of 8155686144 in words is "eight billion, one hundred fifty-five million, six hundred eighty-six thousand, one hundred forty-four".