9649121688 has 48 divisors (see below), whose sum is σ = 26248205880. Its totient is φ = 3202199424.

The previous prime is 9649121683. The next prime is 9649121693. The reversal of 9649121688 is 8861219469.

9649121688 is a `hidden beast` number, since 96 + 491 + 2 + 1 + 68 + 8 = 666.

9649121688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9649121683) and next prime (9649121693).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9649121683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 278845 + ... + 311532.

Almost surely, 2^9649121688 is an apocalyptic number.

It is an amenable number.

9649121688 is an abundant number, since it is smaller than the sum of its proper divisors (16599084192).

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

9649121688 is a wasteful number, since it uses less digits than its factorization.

9649121688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590616 (or 590609 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 9649121688 is about 98229.9429298419. The cubic root of 9649121688 is about 2128.9359440992.

The spelling of 9649121688 in words is "nine billion, six hundred forty-nine million, one hundred twenty-one thousand, six hundred eighty-eight".