56645737 has 8 divisors (see below), whose sum is σ = 57556904. Its totient is φ = 55738368.

The previous prime is 56645731. The next prime is 56645761. The reversal of 56645737 is 73754665.

It can be written as a sum of positive squares in 4 ways, for example, as 12702096 + 43943641 = 3564^2 + 6629^2 .

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

It is a 5-Lehmer number, since φ(56645737) divides (56645737-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 56645737 - 2⁷ = 56645609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56645693 and 56645702.

It is not an unprimeable number, because it can be changed into a prime (56645731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48553 + ... + 49705.

It is an arithmetic number, because the mean of its divisors is an integer number (7194613).

Almost surely, 2^56645737 is an apocalyptic number.

It is an amenable number.

56645737 is a deficient number, since it is larger than the sum of its proper divisors (911167).

56645737 is a wasteful number, since it uses less digits than its factorization.

56645737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899.

The product of its digits is 529200, while the sum is 43.

The square root of 56645737 is about 7526.3362268769. The cubic root of 56645737 is about 384.0511564695.

The spelling of 56645737 in words is "fifty-six million, six hundred forty-five thousand, seven hundred thirty-seven".