8136658420 has 72 divisors (see below), whose sum is σ = 19673242848. Its totient is φ = 2803032000.

The previous prime is 8136658417. The next prime is 8136658559. The reversal of 8136658420 is 248566318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28195 + ... + 130645.

It is an arithmetic number, because the mean of its divisors is an integer number (273239484).

Almost surely, 2^8136658420 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 8136658420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9836621424).

8136658420 is an abundant number, since it is smaller than the sum of its proper divisors (11536584428).

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

8136658420 is a wasteful number, since it uses less digits than its factorization.

8136658420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102509 (or 102488 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 8136658420 is about 90203.4279836415. The cubic root of 8136658420 is about 2011.3239645718.

The spelling of 8136658420 in words is "eight billion, one hundred thirty-six million, six hundred fifty-eight thousand, four hundred twenty".