40556649 has 16 divisors (see below), whose sum is σ = 63795200. Its totient is φ = 22427280.

The previous prime is 40556647. The next prime is 40556653. The reversal of 40556649 is 94665504.

40556649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40556649 - 2¹ = 40556647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40556647) 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 15 ways as a sum of consecutive naturals, for example, 30499 + ... + 31800.

It is an arithmetic number, because the mean of its divisors is an integer number (3987200).

Almost surely, 2^40556649 is an apocalyptic number.

It is an amenable number.

40556649 is a deficient number, since it is larger than the sum of its proper divisors (23238551).

40556649 is a wasteful number, since it uses less digits than its factorization.

40556649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62340.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 40556649 is about 6368.4102411826. The cubic root of 40556649 is about 343.5743140152.

The spelling of 40556649 in words is "forty million, five hundred fifty-six thousand, six hundred forty-nine".