645530469 has 8 divisors (see below), whose sum is σ = 860869632. Its totient is φ = 430272480.

The previous prime is 645530449. The next prime is 645530503. The reversal of 645530469 is 964035546.

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

It is not a de Polignac number, because 645530469 - 2¹¹ = 645528421 is a prime.

It is a super-2 number, since 2×645530469² = 833419172814719922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 645530469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645530419) 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, 1657 + ... + 35969.

It is an arithmetic number, because the mean of its divisors is an integer number (107608704).

Almost surely, 2^645530469 is an apocalyptic number.

It is an amenable number.

645530469 is a deficient number, since it is larger than the sum of its proper divisors (215339163).

645530469 is a wasteful number, since it uses less digits than its factorization.

645530469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40587.

The product of its (nonzero) digits is 388800, while the sum is 42.

The square root of 645530469 is about 25407.2916502330. The cubic root of 645530469 is about 864.2490588036.

The spelling of 645530469 in words is "six hundred forty-five million, five hundred thirty thousand, four hundred sixty-nine".