426859778887 has 4 divisors (see below), whose sum is σ = 426914801440. Its totient is φ = 426804756336.

The previous prime is 426859778881. The next prime is 426859778923. The reversal of 426859778887 is 788877958624.

It is a happy number.

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 426859778887 - 2¹¹ = 426859776839 is a prime.

It is a super-3 number, since 3×426859778887³ (a number of 36 digits) contains 333 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 (426859778881) 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, 27499638 + ... + 27515155.

It is an arithmetic number, because the mean of its divisors is an integer number (106728700360).

Almost surely, 2^426859778887 is an apocalyptic number.

426859778887 is a deficient number, since it is larger than the sum of its proper divisors (55022553).

426859778887 is an equidigital number, since it uses as much as digits as its factorization.

426859778887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55022552.

The product of its digits is 3034644480, while the sum is 79.

The spelling of 426859778887 in words is "four hundred twenty-six billion, eight hundred fifty-nine million, seven hundred seventy-eight thousand, eight hundred eighty-seven".