4640440465 has 8 divisors (see below), whose sum is σ = 5569381800. Its totient is φ = 3711783552.

The previous prime is 4640440457. The next prime is 4640440477. The reversal of 4640440465 is 5640440464.

It can be written as a sum of positive squares in 4 ways, for example, as 121374289 + 4519066176 = 11017^2 + 67224^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 4640440465 - 2³ = 4640440457 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33390 + ... + 101959.

It is an arithmetic number, because the mean of its divisors is an integer number (696172725).

Almost surely, 2^4640440465 is an apocalyptic number.

It is an amenable number.

4640440465 is a deficient number, since it is larger than the sum of its proper divisors (928941335).

4640440465 is a wasteful number, since it uses less digits than its factorization.

4640440465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142211.

The product of its (nonzero) digits is 184320, while the sum is 37.

The square root of 4640440465 is about 68120.7785114058. The cubic root of 4640440465 is about 1667.9629584263.

Subtracting 4640440465 from its reverse (5640440464), we obtain a palindrome (999999999).

The spelling of 4640440465 in words is "four billion, six hundred forty million, four hundred forty thousand, four hundred sixty-five".