9645071642 has 16 divisors (see below), whose sum is σ = 14589238272. Its totient is φ = 4782032640.

The previous prime is 9645071621. The next prime is 9645071647. The reversal of 9645071642 is 2461705469.

9645071642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 9645071593 and 9645071602.

It is not an unprimeable number, because it can be changed into a prime (9645071647) 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 7 ways as a sum of consecutive naturals, for example, 527717 + ... + 545687.

It is an arithmetic number, because the mean of its divisors is an integer number (911827392).

Almost surely, 2^9645071642 is an apocalyptic number.

9645071642 is a deficient number, since it is larger than the sum of its proper divisors (4944166630).

9645071642 is a wasteful number, since it uses less digits than its factorization.

9645071642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20213.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 9645071642 is about 98209.3256366217. The cubic root of 9645071642 is about 2128.6380415054.

The spelling of 9645071642 in words is "nine billion, six hundred forty-five million, seventy-one thousand, six hundred forty-two".