426743805509 has 8 divisors (see below), whose sum is σ = 487737833088. Its totient is φ = 365757434640.

The previous prime is 426743805503. The next prime is 426743805547. The reversal of 426743805509 is 905508347624.

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 426743805509 - 2²⁰ = 426742756933 is a prime.

It is a super-2 number, since 2×426743805509² (a number of 24 digits) 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 (426743805503) 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, 1794242 + ... + 2018115.

It is an arithmetic number, because the mean of its divisors is an integer number (60967229136).

Almost surely, 2^426743805509 is an apocalyptic number.

It is an amenable number.

426743805509 is a deficient number, since it is larger than the sum of its proper divisors (60994027579).

426743805509 is a wasteful number, since it uses less digits than its factorization.

426743805509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3828355.

The product of its (nonzero) digits is 7257600, while the sum is 53.

The spelling of 426743805509 in words is "four hundred twenty-six billion, seven hundred forty-three million, eight hundred five thousand, five hundred nine".