56278641566 has 8 divisors (see below), whose sum is σ = 96477671280. Its totient is φ = 24119417808.

The previous prime is 56278641553. The next prime is 56278641569. The reversal of 56278641566 is 66514687265.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56278641569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2009951471 + ... + 2009951498.

It is an arithmetic number, because the mean of its divisors is an integer number (12059708910).

Almost surely, 2^56278641566 is an apocalyptic number.

56278641566 is a deficient number, since it is larger than the sum of its proper divisors (40199029714).

56278641566 is a wasteful number, since it uses less digits than its factorization.

56278641566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4019902978.

The product of its digits is 14515200, while the sum is 56.

The spelling of 56278641566 in words is "fifty-six billion, two hundred seventy-eight million, six hundred forty-one thousand, five hundred sixty-six".