56801578 has 4 divisors (see below), whose sum is σ = 85202370. Its totient is φ = 28400788.

The previous prime is 56801567. The next prime is 56801587. The reversal of 56801578 is 87510865.

56801578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 56445169 + 356409 = 7513^2 + 597^2 .

It is a super-3 number, since 3×56801578³ (a number of 24 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 56801578.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14200393 + ... + 14200396.

Almost surely, 2^56801578 is an apocalyptic number.

56801578 is a deficient number, since it is larger than the sum of its proper divisors (28400792).

56801578 is a wasteful number, since it uses less digits than its factorization.

56801578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28400791.

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 56801578 is about 7536.6821612696. The cubic root of 56801578 is about 384.4030282776.

The spelling of 56801578 in words is "fifty-six million, eight hundred one thousand, five hundred seventy-eight".