8461620812 has 12 divisors (see below), whose sum is σ = 15318451680. Its totient is φ = 4084920336.

The previous prime is 8461620809. The next prime is 8461620821. The reversal of 8461620812 is 2180261648.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36472388 + ... + 36472619.

It is an arithmetic number, because the mean of its divisors is an integer number (1276537640).

Almost surely, 2^8461620812 is an apocalyptic number.

It is an amenable number.

8461620812 is a deficient number, since it is larger than the sum of its proper divisors (6856830868).

8461620812 is a wasteful number, since it uses less digits than its factorization.

8461620812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72945040 (or 72945038 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 8461620812 is about 91987.0687216415. The cubic root of 8461620812 is about 2037.7513358362.

The spelling of 8461620812 in words is "eight billion, four hundred sixty-one million, six hundred twenty thousand, eight hundred twelve".