9620989645 has 4 divisors (see below), whose sum is σ = 11545187580. Its totient is φ = 7696791712.

The previous prime is 9620989619. The next prime is 9620989657. The reversal of 9620989645 is 5469890269.

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 5204323881 + 4416665764 = 72141^2 + 66458^2 .

It is a cyclic number.

It is not a de Polignac number, because 9620989645 - 2⁷ = 9620989517 is a prime.

It is a super-3 number, since 3×9620989645³ (a number of 31 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 9620989645.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 962098960 + ... + 962098969.

It is an arithmetic number, because the mean of its divisors is an integer number (2886296895).

Almost surely, 2^9620989645 is an apocalyptic number.

It is an amenable number.

9620989645 is a deficient number, since it is larger than the sum of its proper divisors (1924197935).

9620989645 is a wasteful number, since it uses less digits than its factorization.

9620989645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1924197934.

The product of its (nonzero) digits is 8398080, while the sum is 58.

The square root of 9620989645 is about 98086.6435606806. The cubic root of 9620989645 is about 2126.8649571100.

The spelling of 9620989645 in words is "nine billion, six hundred twenty million, nine hundred eighty-nine thousand, six hundred forty-five".