56775769 has 4 divisors (see below), whose sum is σ = 56978100. Its totient is φ = 56573440.

The previous prime is 56775739. The next prime is 56775779. The reversal of 56775769 is 96757765.

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 25000000 + 31775769 = 5000^2 + 5637^2 .

It is a cyclic number.

It is not a de Polignac number, because 56775769 - 2⁵ = 56775737 is a prime.

It is a super-2 number, since 2×56775769² = 6446975891082722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56775709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100744 + ... + 101305.

It is an arithmetic number, because the mean of its divisors is an integer number (14244525).

Almost surely, 2^56775769 is an apocalyptic number.

It is an amenable number.

56775769 is a deficient number, since it is larger than the sum of its proper divisors (202331).

56775769 is a wasteful number, since it uses less digits than its factorization.

56775769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202330.

The product of its digits is 2778300, while the sum is 52.

The square root of 56775769 is about 7534.9697411469. The cubic root of 56775769 is about 384.3447989050.

The spelling of 56775769 in words is "fifty-six million, seven hundred seventy-five thousand, seven hundred sixty-nine".