9825640529 has 4 divisors (see below), whose sum is σ = 10065290340. Its totient is φ = 9585990720.

The previous prime is 9825640477. The next prime is 9825640537. The reversal of 9825640529 is 9250465289.

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 4918918225 + 4906722304 = 70135^2 + 70048^2 .

It is a cyclic number.

It is not a de Polignac number, because 9825640529 - 2³² = 5530673233 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9825640129) 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, 119824844 + ... + 119824925.

It is an arithmetic number, because the mean of its divisors is an integer number (2516322585).

Almost surely, 2^9825640529 is an apocalyptic number.

It is an amenable number.

9825640529 is a deficient number, since it is larger than the sum of its proper divisors (239649811).

9825640529 is a wasteful number, since it uses less digits than its factorization.

9825640529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239649810.

The product of its (nonzero) digits is 1555200, while the sum is 50.

The square root of 9825640529 is about 99124.3689967306. The cubic root of 9825640529 is about 2141.8396654094.

The spelling of 9825640529 in words is "nine billion, eight hundred twenty-five million, six hundred forty thousand, five hundred twenty-nine".