9708888380509 has 4 divisors (see below), whose sum is σ = 9708923007004. Its totient is φ = 9708853754016.

The previous prime is 9708888380479. The next prime is 9708888380551. The reversal of 9708888380509 is 9050838888079.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1510802347609 + 8198086032900 = 1229147^2 + 2863230^2 .

It is a cyclic number.

It is not a de Polignac number, because 9708888380509 - 2¹¹ = 9708888378461 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 (9708888389509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16889202 + ... + 17454595.

It is an arithmetic number, because the mean of its divisors is an integer number (2427230751751).

Almost surely, 2^{9708888380509} is an apocalyptic number.

It is an amenable number.

9708888380509 is a deficient number, since it is larger than the sum of its proper divisors (34626495).

9708888380509 is a wasteful number, since it uses less digits than its factorization.

9708888380509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34626494.

The product of its (nonzero) digits is 278691840, while the sum is 73.

The spelling of 9708888380509 in words is "nine trillion, seven hundred eight billion, eight hundred eighty-eight million, three hundred eighty thousand, five hundred nine".