45643537 has 4 divisors (see below), whose sum is σ = 46756836. Its totient is φ = 44530240.

The previous prime is 45643531. The next prime is 45643541. The reversal of 45643537 is 73534654.

45643537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 6756²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73534654 = 2 ⋅36767327.

It can be written as a sum of positive squares in 2 ways, for example, as 2202256 + 43441281 = 1484^2 + 6591^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45643537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45643496 and 45643505.

It is not an unprimeable number, because it can be changed into a prime (45643531) by changing a digit.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556588 + ... + 556669.

It is an arithmetic number, because the mean of its divisors is an integer number (11689209).

Almost surely, 2^45643537 is an apocalyptic number.

It is an amenable number.

45643537 is a deficient number, since it is larger than the sum of its proper divisors (1113299).

45643537 is a wasteful number, since it uses less digits than its factorization.

45643537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113298.

The product of its digits is 151200, while the sum is 37.

The square root of 45643537 is about 6756.0000740083. Note that the first 4 decimals coincide. The cubic root of 45643537 is about 357.3768614327.

The spelling of 45643537 in words is "forty-five million, six hundred forty-three thousand, five hundred thirty-seven".