56691445 has 8 divisors (see below), whose sum is σ = 68654520. Its totient is φ = 44936640.

The previous prime is 56691443. The next prime is 56691457. The reversal of 56691445 is 54419665.

It is a happy number.

56691445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 14791716 + 41899729 = 3846^2 + 6473^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56691445 - 2¹ = 56691443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56691398 and 56691407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56691443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51466 + ... + 52555.

It is an arithmetic number, because the mean of its divisors is an integer number (8581815).

Almost surely, 2^56691445 is an apocalyptic number.

It is an amenable number.

56691445 is a deficient number, since it is larger than the sum of its proper divisors (11963075).

56691445 is a wasteful number, since it uses less digits than its factorization.

56691445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104135.

The product of its digits is 129600, while the sum is 40.

The square root of 56691445 is about 7529.3721517800. The cubic root of 56691445 is about 384.1544269111.

The spelling of 56691445 in words is "fifty-six million, six hundred ninety-one thousand, four hundred forty-five".