9129138660 has 144 divisors (see below), whose sum is σ = 28018466112. Its totient is φ = 2405894400.

The previous prime is 9129138659. The next prime is 9129138691. The reversal of 9129138660 is 668319219.

It is a happy number.

It is a super-3 number, since 3×9129138660³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5962095 + ... + 5963625.

Almost surely, 2^9129138660 is an apocalyptic number.

9129138660 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9129138660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14009233056).

9129138660 is an abundant number, since it is smaller than the sum of its proper divisors (18889327452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9129138660 is a wasteful number, since it uses less digits than its factorization.

9129138660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914 (or 1909 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 9129138660 is about 95546.5261534924. The cubic root of 9129138660 is about 2089.9854748958.

The spelling of 9129138660 in words is "nine billion, one hundred twenty-nine million, one hundred thirty-eight thousand, six hundred sixty".