426779645 has 16 divisors (see below), whose sum is σ = 556921008. Its totient is φ = 312652800.

The previous prime is 426779593. The next prime is 426779659. The reversal of 426779645 is 546977624.

It can be written as a sum of positive squares in 8 ways, for example, as 6775609 + 420004036 = 2603^2 + 20494^2 .

It is not a de Polignac number, because 426779645 - 2¹⁰ = 426778621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 426779593 and 426779602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64706 + ... + 70995.

It is an arithmetic number, because the mean of its divisors is an integer number (34807563).

Almost surely, 2^426779645 is an apocalyptic number.

It is an amenable number.

426779645 is a deficient number, since it is larger than the sum of its proper divisors (130141363).

426779645 is a wasteful number, since it uses less digits than its factorization.

426779645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135760.

The product of its digits is 2540160, while the sum is 50.

The square root of 426779645 is about 20658.6457687817. The cubic root of 426779645 is about 752.8952651670.

The spelling of 426779645 in words is "four hundred twenty-six million, seven hundred seventy-nine thousand, six hundred forty-five".