56747765 has 4 divisors (see below), whose sum is σ = 68097324. Its totient is φ = 45398208.

The previous prime is 56747741. The next prime is 56747797. The reversal of 56747765 is 56774765.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17522596 + 39225169 = 4186^2 + 6263^2 .

It is a cyclic number.

It is not a de Polignac number, because 56747765 - 2¹⁰ = 56746741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5674772 + ... + 5674781.

It is an arithmetic number, because the mean of its divisors is an integer number (17024331).

Almost surely, 2^56747765 is an apocalyptic number.

It is an amenable number.

56747765 is a deficient number, since it is larger than the sum of its proper divisors (11349559).

56747765 is a wasteful number, since it uses less digits than its factorization.

56747765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11349558.

The product of its digits is 1234800, while the sum is 47.

The square root of 56747765 is about 7533.1112430390. Note that the first 3 decimals coincide. The cubic root of 56747765 is about 384.2815972844.

Subtracting 56747765 from its reverse (56774765), we obtain a cube (27000 = 30³).

The spelling of 56747765 in words is "fifty-six million, seven hundred forty-seven thousand, seven hundred sixty-five".