406306993509 has 8 divisors (see below), whose sum is σ = 601936286720. Its totient is φ = 270871328988.

The previous prime is 406306993471. The next prime is 406306993513. The reversal of 406306993509 is 905399603604.

406306993509 is a `hidden beast` number, since 40 + 6 + 3 + 0 + 6 + 9 + 93 + 509 = 666.

It is not a de Polignac number, because 406306993509 - 2³³ = 397717058917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406306993909) 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, 7524203557 + ... + 7524203610.

It is an arithmetic number, because the mean of its divisors is an integer number (75242035840).

Almost surely, 2^406306993509 is an apocalyptic number.

It is an amenable number.

406306993509 is a deficient number, since it is larger than the sum of its proper divisors (195629293211).

406306993509 is a wasteful number, since it uses less digits than its factorization.

406306993509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15048407176 (or 15048407170 counting only the distinct ones).

The product of its (nonzero) digits is 4723920, while the sum is 54.

The spelling of 406306993509 in words is "four hundred six billion, three hundred six million, nine hundred ninety-three thousand, five hundred nine".