406530020465 has 8 divisors (see below), whose sum is σ = 495833336808. Its totient is φ = 319892474880.

The previous prime is 406530020461. The next prime is 406530020539. The reversal of 406530020465 is 564020035604.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 657819904 + 405872200561 = 25648^2 + 637081^2 .

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

It is not a de Polignac number, because 406530020465 - 2² = 406530020461 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (406530020461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666442352 + ... + 666442961.

It is an arithmetic number, because the mean of its divisors is an integer number (61979167101).

Almost surely, 2^406530020465 is an apocalyptic number.

It is an amenable number.

406530020465 is a deficient number, since it is larger than the sum of its proper divisors (89303316343).

406530020465 is a wasteful number, since it uses less digits than its factorization.

406530020465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332885379.

The product of its (nonzero) digits is 86400, while the sum is 35.

The spelling of 406530020465 in words is "four hundred six billion, five hundred thirty million, twenty thousand, four hundred sixty-five".