426681388779 has 16 divisors (see below), whose sum is σ = 577805839872. Its totient is φ = 280011571488.

The previous prime is 426681388751. The next prime is 426681388801. The reversal of 426681388779 is 977883186624.

426681388779 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 426681388779 - 2²⁷ = 426547171051 is a prime.

It is a super-2 number, since 2×426681388779² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (426681388739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 459864 + ... + 1031909.

It is an arithmetic number, because the mean of its divisors is an integer number (36112864992).

Almost surely, 2^426681388779 is an apocalyptic number.

426681388779 is a deficient number, since it is larger than the sum of its proper divisors (151124451093).

426681388779 is a wasteful number, since it uses less digits than its factorization.

426681388779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493266.

The product of its digits is 195084288, while the sum is 69.

The spelling of 426681388779 in words is "four hundred twenty-six billion, six hundred eighty-one million, three hundred eighty-eight thousand, seven hundred seventy-nine".