6469449645 has 16 divisors (see below), whose sum is σ = 10380787200. Its totient is φ = 3440483904.

The previous prime is 6469449619. The next prime is 6469449647. The reversal of 6469449645 is 5469449646.

6469449645 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6469449645 - 2²³ = 6461061037 is a prime.

It is a super-3 number, since 3×6469449645³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6469449647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 612669 + ... + 623138.

It is an arithmetic number, because the mean of its divisors is an integer number (648799200).

Almost surely, 2^6469449645 is an apocalyptic number.

It is an amenable number.

6469449645 is a deficient number, since it is larger than the sum of its proper divisors (3911337555).

6469449645 is a wasteful number, since it uses less digits than its factorization.

6469449645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236164.

The product of its digits is 22394880, while the sum is 57.

The square root of 6469449645 is about 80432.8890753030. The cubic root of 6469449645 is about 1863.3271513014.

Subtracting from 6469449645 its reverse (5469449646), we obtain a palindrome (999999999).

The spelling of 6469449645 in words is "six billion, four hundred sixty-nine million, four hundred forty-nine thousand, six hundred forty-five".