9915399489 has 16 divisors (see below), whose sum is σ = 13920134400. Its totient is φ = 6260654736.

The previous prime is 9915399467. The next prime is 9915399493. The reversal of 9915399489 is 9849935199.

It is not a de Polignac number, because 9915399489 - 2⁵ = 9915399457 is a prime.

It is a super-2 number, since 2×9915399489² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9915399409) 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, 207442 + ... + 250724.

It is an arithmetic number, because the mean of its divisors is an integer number (870008400).

Almost surely, 2^9915399489 is an apocalyptic number.

It is an amenable number.

9915399489 is a deficient number, since it is larger than the sum of its proper divisors (4004734911).

9915399489 is a wasteful number, since it uses less digits than its factorization.

9915399489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47324.

The product of its digits is 28343520, while the sum is 66.

The square root of 9915399489 is about 99576.0989846459. The cubic root of 9915399489 is about 2148.3419333922.

The spelling of 9915399489 in words is "nine billion, nine hundred fifteen million, three hundred ninety-nine thousand, four hundred eighty-nine".