9662791645 has 16 divisors (see below), whose sum is σ = 12791871792. Its totient is φ = 6961559040.

The previous prime is 9662791637. The next prime is 9662791709. The reversal of 9662791645 is 5461972669.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 528402169 + 9134389476 = 22987^2 + 95574^2 .

It is not a de Polignac number, because 9662791645 - 2³ = 9662791637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1810242 + ... + 1815571.

It is an arithmetic number, because the mean of its divisors is an integer number (799491987).

Almost surely, 2^9662791645 is an apocalyptic number.

It is an amenable number.

9662791645 is a deficient number, since it is larger than the sum of its proper divisors (3129080147).

9662791645 is a wasteful number, since it uses less digits than its factorization.

9662791645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3625872.

The product of its digits is 4898880, while the sum is 55.

The square root of 9662791645 is about 98299.4997189711. The cubic root of 9662791645 is about 2129.9408276302.

The spelling of 9662791645 in words is "nine billion, six hundred sixty-two million, seven hundred ninety-one thousand, six hundred forty-five".