9661111488 has 448 divisors, whose sum is σ = 34540748800. Its totient is φ = 2586608640.

The previous prime is 9661111459. The next prime is 9661111511. The reversal of 9661111488 is 8841111669.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (448).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29187483 + ... + 29187813.

Almost surely, 2^9661111488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9661111488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17270374400).

9661111488 is an abundant number, since it is smaller than the sum of its proper divisors (24879637312).

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

9661111488 is a wasteful number, since it uses less digits than its factorization.

9661111488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 489 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The square root of 9661111488 is about 98290.9532357887. The cubic root of 9661111488 is about 2129.8173697808.

The spelling of 9661111488 in words is "nine billion, six hundred sixty-one million, one hundred eleven thousand, four hundred eighty-eight".