40649563 has 4 divisors (see below), whose sum is σ = 40782280. Its totient is φ = 40516848.

The previous prime is 40649551. The next prime is 40649591. The reversal of 40649563 is 36594604.

It is a happy number.

40649563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40649563 - 2¹³ = 40641371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40649513) 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, 65898 + ... + 66511.

It is an arithmetic number, because the mean of its divisors is an integer number (10195570).

Almost surely, 2^40649563 is an apocalyptic number.

40649563 is a deficient number, since it is larger than the sum of its proper divisors (132717).

40649563 is a wasteful number, since it uses less digits than its factorization.

40649563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132716.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 40649563 is about 6375.7009810687. The cubic root of 40649563 is about 343.8364865359.

The spelling of 40649563 in words is "forty million, six hundred forty-nine thousand, five hundred sixty-three".