56521805870 has 16 divisors (see below), whose sum is σ = 107723912688. Its totient is φ = 21278797440.

The previous prime is 56521805869. The next prime is 56521805909. The reversal of 56521805870 is 7850812565.

It is a happy number.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 166240436 + ... + 166240775.

It is an arithmetic number, because the mean of its divisors is an integer number (6732744543).

Almost surely, 2^56521805870 is an apocalyptic number.

56521805870 is a deficient number, since it is larger than the sum of its proper divisors (51202106818).

56521805870 is a wasteful number, since it uses less digits than its factorization.

56521805870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332481235.

The product of its (nonzero) digits is 672000, while the sum is 47.

The spelling of 56521805870 in words is "fifty-six billion, five hundred twenty-one million, eight hundred five thousand, eight hundred seventy".