405136465 has 4 divisors (see below), whose sum is σ = 486163764. Its totient is φ = 324109168.

The previous prime is 405136451. The next prime is 405136483. The reversal of 405136465 is 564631504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 146023056 + 259113409 = 12084^2 + 16097^2 .

It is a cyclic number.

It is not a de Polignac number, because 405136465 - 2¹¹ = 405134417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 405136465.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40513642 + ... + 40513651.

It is an arithmetic number, because the mean of its divisors is an integer number (121540941).

Almost surely, 2^405136465 is an apocalyptic number.

It is an amenable number.

405136465 is a deficient number, since it is larger than the sum of its proper divisors (81027299).

405136465 is an equidigital number, since it uses as much as digits as its factorization.

405136465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81027298.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 405136465 is about 20128.0020121223. The cubic root of 405136465 is about 739.9467121355.

Adding to 405136465 its reverse (564631504), we get a palindrome (969767969).

The spelling of 405136465 in words is "four hundred five million, one hundred thirty-six thousand, four hundred sixty-five".