9990143081 has 16 divisors (see below), whose sum is σ = 10611112320. Its totient is φ = 9385031040.

The previous prime is 9990143069. The next prime is 9990143083. The reversal of 9990143081 is 1803410999.

It is a cyclic number.

It is not a de Polignac number, because 9990143081 - 2²⁶ = 9923034217 is a prime.

It is a super-2 number, since 2×9990143081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9990143083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1789811 + ... + 1795383.

It is an arithmetic number, because the mean of its divisors is an integer number (663194520).

Almost surely, 2^9990143081 is an apocalyptic number.

It is an amenable number.

9990143081 is a deficient number, since it is larger than the sum of its proper divisors (620969239).

9990143081 is a wasteful number, since it uses less digits than its factorization.

9990143081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6976.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 9990143081 is about 99950.7032541542. The cubic root of 9990143081 is about 2153.7265877163.

The spelling of 9990143081 in words is "nine billion, nine hundred ninety million, one hundred forty-three thousand, eighty-one".