56421456065 has 8 divisors (see below), whose sum is σ = 72913881768. Its totient is φ = 41665075200.

The previous prime is 56421456053. The next prime is 56421456071. The reversal of 56421456065 is 56065412465.

It can be written as a sum of positive squares in 4 ways, for example, as 5041 + 56421451024 = 71^2 + 237532^2 .

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

It is not a de Polignac number, because 56421456065 - 2¹² = 56421451969 is a prime.

It is a Curzon number.

It is an unprimeable number.

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, 434011136 + ... + 434011265.

It is an arithmetic number, because the mean of its divisors is an integer number (9114235221).

Almost surely, 2^56421456065 is an apocalyptic number.

It is an amenable number.

56421456065 is a deficient number, since it is larger than the sum of its proper divisors (16492425703).

56421456065 is a wasteful number, since it uses less digits than its factorization.

56421456065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868022419.

The product of its (nonzero) digits is 864000, while the sum is 44.

The spelling of 56421456065 in words is "fifty-six billion, four hundred twenty-one million, four hundred fifty-six thousand, sixty-five".