56736569 has 4 divisors (see below), whose sum is σ = 56751696. Its totient is φ = 56721444.

The previous prime is 56736487. The next prime is 56736587. The reversal of 56736569 is 96563765.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56736569 is a prime.

It is a super-2 number, since 2×56736569² = 6438076523783522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56736269) 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, 2762 + ... + 11004.

It is an arithmetic number, because the mean of its divisors is an integer number (14187924).

Almost surely, 2^56736569 is an apocalyptic number.

It is an amenable number.

56736569 is a deficient number, since it is larger than the sum of its proper divisors (15127).

56736569 is an equidigital number, since it uses as much as digits as its factorization.

56736569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15126.

The product of its digits is 1020600, while the sum is 47.

The square root of 56736569 is about 7532.3680871290. The cubic root of 56736569 is about 384.2563234565.

The spelling of 56736569 in words is "fifty-six million, seven hundred thirty-six thousand, five hundred sixty-nine".