56685519645 has 16 divisors (see below), whose sum is σ = 90700188480. Its totient is φ = 30231158144.

The previous prime is 56685519641. The next prime is 56685519647. The reversal of 56685519645 is 54691558665.

56685519645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 56685519645 - 2² = 56685519641 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56685519641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 497161 + ... + 600449.

It is an arithmetic number, because the mean of its divisors is an integer number (5668761780).

Almost surely, 2^56685519645 is an apocalyptic number.

It is an amenable number.

56685519645 is a deficient number, since it is larger than the sum of its proper divisors (34014668835).

56685519645 is a wasteful number, since it uses less digits than its factorization.

56685519645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139884.

The product of its digits is 38880000, while the sum is 60.

The spelling of 56685519645 in words is "fifty-six billion, six hundred eighty-five million, five hundred nineteen thousand, six hundred forty-five".