9865142108 has 24 divisors (see below), whose sum is σ = 17360093184. Its totient is φ = 4905154800.

The previous prime is 9865142081. The next prime is 9865142123. The reversal of 9865142108 is 8012415689.

It is a super-2 number, since 2×9865142108² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1200293 + ... + 1208483.

It is an arithmetic number, because the mean of its divisors is an integer number (723337216).

Almost surely, 2^9865142108 is an apocalyptic number.

It is an amenable number.

9865142108 is a deficient number, since it is larger than the sum of its proper divisors (7494951076).

9865142108 is a wasteful number, since it uses less digits than its factorization.

9865142108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9833 (or 9831 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 9865142108 is about 99323.4217493538. The cubic root of 9865142108 is about 2144.7060747038.

The spelling of 9865142108 in words is "nine billion, eight hundred sixty-five million, one hundred forty-two thousand, one hundred eight".