8143705851 has 16 divisors (see below), whose sum is σ = 10970042880. Its totient is φ = 5373295200.

The previous prime is 8143705799. The next prime is 8143705853. The reversal of 8143705851 is 1585073418.

It is not a de Polignac number, because 8143705851 - 2¹³ = 8143697659 is a prime.

It is a super-2 number, since 2×8143705851² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8143705853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1391790 + ... + 1397628.

It is an arithmetic number, because the mean of its divisors is an integer number (685627680).

Almost surely, 2^8143705851 is an apocalyptic number.

8143705851 is a deficient number, since it is larger than the sum of its proper divisors (2826337029).

8143705851 is a wasteful number, since it uses less digits than its factorization.

8143705851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10546.

The product of its (nonzero) digits is 134400, while the sum is 42.

The square root of 8143705851 is about 90242.4836260616. The cubic root of 8143705851 is about 2011.9044885704.

The spelling of 8143705851 in words is "eight billion, one hundred forty-three million, seven hundred five thousand, eight hundred fifty-one".