64845469 has 12 divisors (see below), whose sum is σ = 70537716. Its totient is φ = 59584512.

The previous prime is 64845467. The next prime is 64845503. The reversal of 64845469 is 96454846.

It can be written as a sum of positive squares in 6 ways, for example, as 1452025 + 63393444 = 1205^2 + 7962^2 .

It is not a de Polignac number, because 64845469 - 2¹ = 64845467 is a prime.

It is a super-2 number, since 2×64845469² = 8409869699659922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64845467) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42687 + ... + 44179.

It is an arithmetic number, because the mean of its divisors is an integer number (5878143).

Almost surely, 2^64845469 is an apocalyptic number.

It is an amenable number.

64845469 is a deficient number, since it is larger than the sum of its proper divisors (5692247).

64845469 is a wasteful number, since it uses less digits than its factorization.

64845469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776 (or 1763 counting only the distinct ones).

The product of its digits is 829440, while the sum is 46.

The square root of 64845469 is about 8052.6684397161. The cubic root of 64845469 is about 401.7536939080.

The spelling of 64845469 in words is "sixty-four million, eight hundred forty-five thousand, four hundred sixty-nine".