9975770909 has 16 divisors (see below), whose sum is σ = 10857683760. Its totient is φ = 9110361600.

The previous prime is 9975770881. The next prime is 9975770921. The reversal of 9975770909 is 9090775799.

It is a happy number.

9975770909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 156025 + 9975614884 = 395^2 + 99878^2 .

It is not a de Polignac number, because 9975770909 - 2¹⁶ = 9975705373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9975770999) 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 15 ways as a sum of consecutive naturals, for example, 2741039 + ... + 2744675.

It is an arithmetic number, because the mean of its divisors is an integer number (678605235).

Almost surely, 2^9975770909 is an apocalyptic number.

It is an amenable number.

9975770909 is a deficient number, since it is larger than the sum of its proper divisors (881912851).

9975770909 is a wasteful number, since it uses less digits than its factorization.

9975770909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5840.

The product of its (nonzero) digits is 11252115, while the sum is 62.

The square root of 9975770909 is about 99878.7810748609. The cubic root of 9975770909 is about 2152.6932830448.

The spelling of 9975770909 in words is "nine billion, nine hundred seventy-five million, seven hundred seventy thousand, nine hundred nine".