9747512985 has 32 divisors (see below), whose sum is σ = 17831531520. Its totient is φ = 4454129088.

The previous prime is 9747512927. The next prime is 9747512987. The reversal of 9747512985 is 5892157479.

It is not a de Polignac number, because 9747512985 - 2¹¹ = 9747510937 is a prime.

It is a super-2 number, since 2×9747512985² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (9747512987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 248314 + ... + 284876.

It is an arithmetic number, because the mean of its divisors is an integer number (557235360).

Almost surely, 2^9747512985 is an apocalyptic number.

It is an amenable number.

9747512985 is a deficient number, since it is larger than the sum of its proper divisors (8084018535).

9747512985 is a wasteful number, since it uses less digits than its factorization.

9747512985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39117.

The product of its digits is 6350400, while the sum is 57.

The square root of 9747512985 is about 98729.4939974879. The cubic root of 9747512985 is about 2136.1476815351.

The spelling of 9747512985 in words is "nine billion, seven hundred forty-seven million, five hundred twelve thousand, nine hundred eighty-five".