8156061680 has 120 divisors (see below), whose sum is σ = 20586727008. Its totient is φ = 3003706368.

The previous prime is 8156061677. The next prime is 8156061707. The reversal of 8156061680 is 861606518.

It is a happy 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 23 ways as a sum of consecutive naturals, for example, 9909749 + ... + 9910571.

Almost surely, 2^8156061680 is an apocalyptic number.

8156061680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8156061680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10293363504).

8156061680 is an abundant number, since it is smaller than the sum of its proper divisors (12430665328).

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

8156061680 is a wasteful number, since it uses less digits than its factorization.

8156061680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595 (or 1576 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 8156061680 is about 90310.9167266062. The cubic root of 8156061680 is about 2012.9214779184.

The spelling of 8156061680 in words is "eight billion, one hundred fifty-six million, sixty-one thousand, six hundred eighty".