56705643 has 16 divisors (see below), whose sum is σ = 86906400. Its totient is φ = 36499680.

The previous prime is 56705639. The next prime is 56705657. The reversal of 56705643 is 34650765.

56705643 is a `hidden beast` number, since 5 + 6 + 7 + 0 + 5 + 643 = 666.

It is not a de Polignac number, because 56705643 - 2² = 56705639 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 56705598 and 56705607.

It is not an unprimeable number, because it can be changed into a prime (56705543) 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, 35428 + ... + 36993.

It is an arithmetic number, because the mean of its divisors is an integer number (5431650).

Almost surely, 2^56705643 is an apocalyptic number.

56705643 is a deficient number, since it is larger than the sum of its proper divisors (30200757).

56705643 is a wasteful number, since it uses less digits than its factorization.

56705643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72459 (or 72453 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The square root of 56705643 is about 7530.3149336532. The cubic root of 56705643 is about 384.1864938852.

The spelling of 56705643 in words is "fifty-six million, seven hundred five thousand, six hundred forty-three".