9640902659 has 4 divisors (see below), whose sum is σ = 9642221520. Its totient is φ = 9639583800.

The previous prime is 9640902637. The next prime is 9640902673. The reversal of 9640902659 is 9562090469.

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

It is a cyclic number.

It is not a de Polignac number, because 9640902659 - 2¹² = 9640898563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9640902059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648404 + ... + 663105.

It is an arithmetic number, because the mean of its divisors is an integer number (2410555380).

Almost surely, 2^9640902659 is an apocalyptic number.

9640902659 is a deficient number, since it is larger than the sum of its proper divisors (1318861).

9640902659 is a wasteful number, since it uses less digits than its factorization.

9640902659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318860.

The product of its (nonzero) digits is 1049760, while the sum is 50.

The square root of 9640902659 is about 98188.0983571838. The cubic root of 9640902659 is about 2128.3313033409.

The spelling of 9640902659 in words is "nine billion, six hundred forty million, nine hundred two thousand, six hundred fifty-nine".