6469009645 has 12 divisors (see below), whose sum is σ = 9030209724. Its totient is φ = 4435892160.

The previous prime is 6469009627. The next prime is 6469009669. The reversal of 6469009645 is 5469009646.

It can be written as a sum of positive squares in 2 ways, for example, as 1611059044 + 4857950601 = 40138^2 + 69699^2 .

It is not a de Polignac number, because 6469009645 - 2⁷ = 6469009517 is a prime.

It is a super-3 number, since 3×6469009645³ (a number of 30 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13201816 + ... + 13202305.

It is an arithmetic number, because the mean of its divisors is an integer number (752517477).

Almost surely, 2^6469009645 is an apocalyptic number.

It is an amenable number.

6469009645 is a deficient number, since it is larger than the sum of its proper divisors (2561200079).

6469009645 is a wasteful number, since it uses less digits than its factorization.

6469009645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26404140 (or 26404133 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 49.

The square root of 6469009645 is about 80430.1538292698. The cubic root of 6469009645 is about 1863.2849074950.

Subtracting from 6469009645 its reverse (5469009646), we obtain a palindrome (999999999).

The spelling of 6469009645 in words is "six billion, four hundred sixty-nine million, nine thousand, six hundred forty-five".