425655565 has 8 divisors (see below), whose sum is σ = 510950808. Its totient is φ = 340415040.

The previous prime is 425655557. The next prime is 425655569. The reversal of 425655565 is 565556524.

It can be written as a sum of positive squares in 4 ways, for example, as 67272804 + 358382761 = 8202^2 + 18931^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 425655565 - 2³ = 425655557 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 (425655569) 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, 6019 + ... + 29791.

It is an arithmetic number, because the mean of its divisors is an integer number (63868851).

Almost surely, 2^425655565 is an apocalyptic number.

It is an amenable number.

425655565 is a deficient number, since it is larger than the sum of its proper divisors (85295243).

425655565 is a wasteful number, since it uses less digits than its factorization.

425655565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27359.

The product of its digits is 900000, while the sum is 43.

The square root of 425655565 is about 20631.4217881367. The cubic root of 425655565 is about 752.2336758006.

The spelling of 425655565 in words is "four hundred twenty-five million, six hundred fifty-five thousand, five hundred sixty-five".