8121441553 has 4 divisors (see below), whose sum is σ = 8155422720. Its totient is φ = 8087460388.

The previous prime is 8121441551. The next prime is 8121441589. The reversal of 8121441553 is 3551441218.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8121441553 - 2¹ = 8121441551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8121441551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16990225 + ... + 16990702.

It is an arithmetic number, because the mean of its divisors is an integer number (2038855680).

Almost surely, 2^8121441553 is an apocalyptic number.

It is an amenable number.

8121441553 is a deficient number, since it is larger than the sum of its proper divisors (33981167).

8121441553 is a wasteful number, since it uses less digits than its factorization.

8121441553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33981166.

The product of its digits is 19200, while the sum is 34.

The square root of 8121441553 is about 90119.0410124298. The cubic root of 8121441553 is about 2010.0693484485.

The spelling of 8121441553 in words is "eight billion, one hundred twenty-one million, four hundred forty-one thousand, five hundred fifty-three".