56757207649 has 4 divisors (see below), whose sum is σ = 56803999636. Its totient is φ = 56710415664.

The previous prime is 56757207629. The next prime is 56757207659. The reversal of 56757207649 is 94670275765.

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 16494778624 + 40262429025 = 128432^2 + 200655^2 .

It is a cyclic number.

It is not a de Polignac number, because 56757207649 - 2¹⁷ = 56757076577 is a prime.

It is a super-2 number, since 2×56757207649² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56757207593 and 56757207602.

It is not an unprimeable number, because it can be changed into a prime (56757207629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23394174 + ... + 23396599.

It is an arithmetic number, because the mean of its divisors is an integer number (14200999909).

Almost surely, 2^56757207649 is an apocalyptic number.

It is an amenable number.

56757207649 is a deficient number, since it is larger than the sum of its proper divisors (46791987).

56757207649 is a wasteful number, since it uses less digits than its factorization.

56757207649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46791986.

The product of its (nonzero) digits is 22226400, while the sum is 58.

The spelling of 56757207649 in words is "fifty-six billion, seven hundred fifty-seven million, two hundred seven thousand, six hundred forty-nine".