56521678 has 8 divisors (see below), whose sum is σ = 85019760. Its totient is φ = 28181760.

The previous prime is 56521631. The next prime is 56521687. The reversal of 56521678 is 87612565.

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

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 56521678.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 38643 + ... + 40078.

It is an arithmetic number, because the mean of its divisors is an integer number (10627470).

Almost surely, 2^56521678 is an apocalyptic number.

56521678 is a deficient number, since it is larger than the sum of its proper divisors (28498082).

56521678 is a wasteful number, since it uses less digits than its factorization.

56521678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79082.

The product of its digits is 100800, while the sum is 40.

The square root of 56521678 is about 7518.0900500061. The cubic root of 56521678 is about 383.7705832700.

The spelling of 56521678 in words is "fifty-six million, five hundred twenty-one thousand, six hundred seventy-eight".