56478641 has 4 divisors (see below), whose sum is σ = 59800932. Its totient is φ = 53156352.

The previous prime is 56478637. The next prime is 56478649. The reversal of 56478641 is 14687465.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24216241 + 32262400 = 4921^2 + 5680^2 .

It is a cyclic number.

It is not a de Polignac number, because 56478641 - 2² = 56478637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56478649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1661120 + ... + 1661153.

It is an arithmetic number, because the mean of its divisors is an integer number (14950233).

Almost surely, 2^56478641 is an apocalyptic number.

It is an amenable number.

56478641 is a deficient number, since it is larger than the sum of its proper divisors (3322291).

56478641 is a wasteful number, since it uses less digits than its factorization.

56478641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3322290.

The product of its digits is 161280, while the sum is 41.

The square root of 56478641 is about 7515.2272753390. The cubic root of 56478641 is about 383.6731544077.

The spelling of 56478641 in words is "fifty-six million, four hundred seventy-eight thousand, six hundred forty-one".