8120461620 has 24 divisors (see below), whose sum is σ = 22737292704. Its totient is φ = 2165456416.

The previous prime is 8120461619. The next prime is 8120461631. The reversal of 8120461620 is 261640218.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67670454 + ... + 67670573.

It is an arithmetic number, because the mean of its divisors is an integer number (947387196).

Almost surely, 2^8120461620 is an apocalyptic number.

It is an amenable number.

8120461620 is an abundant number, since it is smaller than the sum of its proper divisors (14616831084).

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

8120461620 is a wasteful number, since it uses less digits than its factorization.

8120461620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135341039 (or 135341037 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 8120461620 is about 90113.6039674366. The cubic root of 8120461620 is about 2009.9885002189.

The spelling of 8120461620 in words is "eight billion, one hundred twenty million, four hundred sixty-one thousand, six hundred twenty".