9964852569 has 24 divisors (see below), whose sum is σ = 16509330240. Its totient is φ = 5673634848.

The previous prime is 9964852561. The next prime is 9964852591. The reversal of 9964852569 is 9652584699.

9964852569 is a `hidden beast` number, since 9 + 9 + 6 + 48 + 525 + 69 = 666.

It is not a de Polignac number, because 9964852569 - 2³ = 9964852561 is a prime.

It is a super-2 number, since 2×9964852569² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (9964852561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 268059 + ... + 302960.

It is an arithmetic number, because the mean of its divisors is an integer number (687888760).

Almost surely, 2^9964852569 is an apocalyptic number.

It is an amenable number.

9964852569 is a deficient number, since it is larger than the sum of its proper divisors (6544477671).

9964852569 is a wasteful number, since it uses less digits than its factorization.

9964852569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571309 (or 571306 counting only the distinct ones).

The product of its digits is 41990400, while the sum is 63.

The square root of 9964852569 is about 99824.1081552948. The cubic root of 9964852569 is about 2151.9076322420.

The spelling of 9964852569 in words is "nine billion, nine hundred sixty-four million, eight hundred fifty-two thousand, five hundred sixty-nine".