8321144431853 has 24 divisors (see below), whose sum is σ = 9258349818144. Its totient is φ = 7472106591840.

The previous prime is 8321144431819. The next prime is 8321144431903. The reversal of 8321144431853 is 3581344411238.

It is not a de Polignac number, because 8321144431853 - 2²² = 8321140237549 is a prime.

It is a super-2 number, since 2×8321144431853² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8321144431798 and 8321144431807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8321144431253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54286226 + ... + 54439292.

It is an arithmetic number, because the mean of its divisors is an integer number (385764575756).

Almost surely, 2^{8321144431853} is an apocalyptic number.

8321144431853 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

It is an amenable number.

8321144431853 is a deficient number, since it is larger than the sum of its proper divisors (937205386291).

8321144431853 is a wasteful number, since it uses less digits than its factorization.

8321144431853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158585 (or 158574 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 47.

The spelling of 8321144431853 in words is "eight trillion, three hundred twenty-one billion, one hundred forty-four million, four hundred thirty-one thousand, eight hundred fifty-three".