40645763 has 4 divisors (see below), whose sum is σ = 40956168. Its totient is φ = 40335360.

The previous prime is 40645747. The next prime is 40645777. The reversal of 40645763 is 36754604.

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 40645763 - 2⁴ = 40645747 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (40645723) 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 3 ways as a sum of consecutive naturals, for example, 155006 + ... + 155267.

It is an arithmetic number, because the mean of its divisors is an integer number (10239042).

Almost surely, 2^40645763 is an apocalyptic number.

40645763 is a deficient number, since it is larger than the sum of its proper divisors (310405).

40645763 is a wasteful number, since it uses less digits than its factorization.

40645763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310404.

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 40645763 is about 6375.4029676562. The cubic root of 40645763 is about 343.8257720348.

The spelling of 40645763 in words is "forty million, six hundred forty-five thousand, seven hundred sixty-three".