9659785040 has 40 divisors (see below), whose sum is σ = 22743306240. Its totient is φ = 3815001216.

The previous prime is 9659785021. The next prime is 9659785043. The reversal of 9659785040 is 405879569.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×9659785040² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9659785043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 757904 + ... + 770543.

It is an arithmetic number, because the mean of its divisors is an integer number (568582656).

Almost surely, 2^9659785040 is an apocalyptic number.

It is an amenable number.

9659785040 is an abundant number, since it is smaller than the sum of its proper divisors (13083521200).

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

9659785040 is a wasteful number, since it uses less digits than its factorization.

9659785040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528539 (or 1528533 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 53.

The square root of 9659785040 is about 98284.2054452291. The cubic root of 9659785040 is about 2129.7198923392.

The spelling of 9659785040 in words is "nine billion, six hundred fifty-nine million, seven hundred eighty-five thousand, forty".