8121938600 has 48 divisors (see below), whose sum is σ = 18973101120. Its totient is φ = 3233361600.

The previous prime is 8121938567. The next prime is 8121938603. The reversal of 8121938600 is 68391218.

It is not an unprimeable number, because it can be changed into a prime (8121938603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54032 + ... + 138431.

It is an arithmetic number, because the mean of its divisors is an integer number (395272940).

Almost surely, 2^8121938600 is an apocalyptic number.

It is an amenable number.

8121938600 is an abundant number, since it is smaller than the sum of its proper divisors (10851162520).

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

8121938600 is a wasteful number, since it uses less digits than its factorization.

8121938600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192690 (or 192681 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 8121938600 is about 90121.7986948774. The cubic root of 8121938600 is about 2010.1103542458.

The spelling of 8121938600 in words is "eight billion, one hundred twenty-one million, nine hundred thirty-eight thousand, six hundred".