426778398863 has 4 divisors (see below), whose sum is σ = 430036249368. Its totient is φ = 423520548360.

The previous prime is 426778398859. The next prime is 426778398887. The reversal of 426778398863 is 368893877624.

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

It is a cyclic number.

It is not a de Polignac number, because 426778398863 - 2² = 426778398859 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 (426778398833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1628925056 + ... + 1628925317.

It is an arithmetic number, because the mean of its divisors is an integer number (107509062342).

Almost surely, 2^426778398863 is an apocalyptic number.

426778398863 is a deficient number, since it is larger than the sum of its proper divisors (3257850505).

426778398863 is a wasteful number, since it uses less digits than its factorization.

426778398863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3257850504.

The product of its digits is 585252864, while the sum is 71.

The spelling of 426778398863 in words is "four hundred twenty-six billion, seven hundred seventy-eight million, three hundred ninety-eight thousand, eight hundred sixty-three".