8121019554 has 32 divisors (see below), whose sum is σ = 18051612480. Its totient is φ = 2706271200.

The previous prime is 8121019531. The next prime is 8121019591. The reversal of 8121019554 is 4559101218.

8121019554 is a `hidden beast` number, since 81 + 2 + 10 + 19 + 554 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202534 + ... + 239294.

It is an arithmetic number, because the mean of its divisors is an integer number (564112890).

Almost surely, 2^8121019554 is an apocalyptic number.

8121019554 is an abundant number, since it is smaller than the sum of its proper divisors (9930592926).

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

8121019554 is a wasteful number, since it uses less digits than its factorization.

8121019554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40863 (or 40857 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The square root of 8121019554 is about 90116.6996399668. The cubic root of 8121019554 is about 2010.0345327103.

The spelling of 8121019554 in words is "eight billion, one hundred twenty-one million, nineteen thousand, five hundred fifty-four".