426663645431 has 8 divisors (see below), whose sum is σ = 443595532800. Its totient is φ = 409929792120.

The previous prime is 426663645407. The next prime is 426663645469. The reversal of 426663645431 is 134546366624.

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 426663645431 - 2¹⁸ = 426663383287 is a prime.

It is a super-2 number, since 2×426663645431² (a number of 24 digits) contains 22 as substring.

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 426663645431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426663645131) 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, 49504121 + ... + 49512738.

It is an arithmetic number, because the mean of its divisors is an integer number (55449441600).

Almost surely, 2^426663645431 is an apocalyptic number.

426663645431 is a deficient number, since it is larger than the sum of its proper divisors (16931887369).

426663645431 is a wasteful number, since it uses less digits than its factorization.

426663645431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99017029.

The product of its digits is 7464960, while the sum is 50.

The spelling of 426663645431 in words is "four hundred twenty-six billion, six hundred sixty-three million, six hundred forty-five thousand, four hundred thirty-one".