9926417985 has 32 divisors (see below), whose sum is σ = 17408286720. Its totient is φ = 4789982400.

The previous prime is 9926417983. The next prime is 9926417989. The reversal of 9926417985 is 5897146299.

It is not a de Polignac number, because 9926417985 - 2¹ = 9926417983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9926417983) 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, 107745 + ... + 177374.

It is an arithmetic number, because the mean of its divisors is an integer number (544008960).

Almost surely, 2^9926417985 is an apocalyptic number.

It is an amenable number.

9926417985 is a deficient number, since it is larger than the sum of its proper divisors (7481868735).

9926417985 is a wasteful number, since it uses less digits than its factorization.

9926417985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285349.

The product of its digits is 9797760, while the sum is 60.

The square root of 9926417985 is about 99631.4106343978. The cubic root of 9926417985 is about 2149.1374210613.

The spelling of 9926417985 in words is "nine billion, nine hundred twenty-six million, four hundred seventeen thousand, nine hundred eighty-five".