9989826145 has 16 divisors (see below), whose sum is σ = 12916390032. Its totient is φ = 7373410560.

The previous prime is 9989826131. The next prime is 9989826169. The reversal of 9989826145 is 5416289899.

It can be written as a sum of positive squares in 8 ways, for example, as 24196561 + 9965629584 = 4919^2 + 99828^2 .

It is not a de Polignac number, because 9989826145 - 2⁹ = 9989825633 is a prime.

It is a super-2 number, since 2×9989826145² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96015 + ... + 170875.

It is an arithmetic number, because the mean of its divisors is an integer number (807274377).

Almost surely, 2^9989826145 is an apocalyptic number.

It is an amenable number.

9989826145 is a deficient number, since it is larger than the sum of its proper divisors (2926563887).

9989826145 is a wasteful number, since it uses less digits than its factorization.

9989826145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76932.

The product of its digits is 11197440, while the sum is 61.

The square root of 9989826145 is about 99949.1177799984. The cubic root of 9989826145 is about 2153.7038119094.

The spelling of 9989826145 in words is "nine billion, nine hundred eighty-nine million, eight hundred twenty-six thousand, one hundred forty-five".