425655681 has 8 divisors (see below), whose sum is σ = 619135584. Its totient is φ = 257973120.

The previous prime is 425655653. The next prime is 425655683. The reversal of 425655681 is 186556524.

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

It is not a de Polignac number, because 425655681 - 2¹⁰ = 425654657 is a prime.

It is a super-2 number, since 2×425655681² = 362365517535147522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (425655683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6449296 + ... + 6449361.

It is an arithmetic number, because the mean of its divisors is an integer number (77391948).

Almost surely, 2^425655681 is an apocalyptic number.

It is an amenable number.

425655681 is a deficient number, since it is larger than the sum of its proper divisors (193479903).

425655681 is a wasteful number, since it uses less digits than its factorization.

425655681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12898671.

The product of its digits is 288000, while the sum is 42.

The square root of 425655681 is about 20631.4245993824. The cubic root of 425655681 is about 752.2337441337.

The spelling of 425655681 in words is "four hundred twenty-five million, six hundred fifty-five thousand, six hundred eighty-one".