9975809742 has 48 divisors (see below), whose sum is σ = 21086704080. Its totient is φ = 3145809024.

The previous prime is 9975809719. The next prime is 9975809747. The reversal of 9975809742 is 2479085799.

9975809742 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9975809747) 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 23 ways as a sum of consecutive naturals, for example, 1749448 + ... + 1755140.

It is an arithmetic number, because the mean of its divisors is an integer number (439306335).

Almost surely, 2^9975809742 is an apocalyptic number.

9975809742 is an abundant number, since it is smaller than the sum of its proper divisors (11110894338).

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

9975809742 is a wasteful number, since it uses less digits than its factorization.

9975809742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6545 (or 6526 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 60.

The square root of 9975809742 is about 99878.9754753221. The cubic root of 9975809742 is about 2152.6960763270.

The spelling of 9975809742 in words is "nine billion, nine hundred seventy-five million, eight hundred nine thousand, seven hundred forty-two".