8121345900 has 72 divisors (see below), whose sum is σ = 24255780864. Its totient is φ = 2095828800.

The previous prime is 8121345899. The next prime is 8121345907. The reversal of 8121345900 is 95431218.

It is not an unprimeable number, because it can be changed into a prime (8121345907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 427332 + ... + 445931.

Almost surely, 2^8121345900 is an apocalyptic number.

It is an amenable number.

8121345900 is an abundant number, since it is smaller than the sum of its proper divisors (16134434964).

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

8121345900 is a wasteful number, since it uses less digits than its factorization.

8121345900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873311 (or 873304 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 8121345900 is about 90118.5103072615. The cubic root of 8121345900 is about 2010.0614569957.

The spelling of 8121345900 in words is "eight billion, one hundred twenty-one million, three hundred forty-five thousand, nine hundred".