9640551 has 8 divisors (see below), whose sum is σ = 12981744. Its totient is φ = 6363200.

The previous prime is 9640549. The next prime is 9640577. The reversal of 9640551 is 1550469.

9640551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9640551 - 2¹ = 9640549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9640591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15606 + ... + 16211.

It is an arithmetic number, because the mean of its divisors is an integer number (1622718).

Almost surely, 2^9640551 is an apocalyptic number.

9640551 is a deficient number, since it is larger than the sum of its proper divisors (3341193).

9640551 is a wasteful number, since it uses less digits than its factorization.

9640551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31921.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 9640551 is about 3104.9236705594. The cubic root of 9640551 is about 212.8305425544.

The spelling of 9640551 in words is "nine million, six hundred forty thousand, five hundred fifty-one".