9975775208 has 32 divisors (see below), whose sum is σ = 21576456000. Its totient is φ = 4235373312.

The previous prime is 9975775207. The next prime is 9975775217. The reversal of 9975775208 is 8025775799.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (9975775207) 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, 826433 + ... + 838416.

It is an arithmetic number, because the mean of its divisors is an integer number (674264250).

Almost surely, 2^9975775208 is an apocalyptic number.

It is an amenable number.

9975775208 is an abundant number, since it is smaller than the sum of its proper divisors (11600680792).

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

9975775208 is a wasteful number, since it uses less digits than its factorization.

9975775208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664969 (or 1664965 counting only the distinct ones).

The product of its (nonzero) digits is 11113200, while the sum is 59.

The square root of 9975775208 is about 99878.8025959463. The cubic root of 9975775208 is about 2152.6935922750.

The spelling of 9975775208 in words is "nine billion, nine hundred seventy-five million, seven hundred seventy-five thousand, two hundred eight".