40065250639 has 4 divisors (see below), whose sum is σ = 40066253424. Its totient is φ = 40064247856.

The previous prime is 40065250601. The next prime is 40065250649. The reversal of 40065250639 is 93605256004.

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 40065250639 - 2¹¹ = 40065248591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40065250649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438862 + ... + 522235.

It is an arithmetic number, because the mean of its divisors is an integer number (10016563356).

Almost surely, 2^40065250639 is an apocalyptic number.

40065250639 is a deficient number, since it is larger than the sum of its proper divisors (1002785).

40065250639 is an equidigital number, since it uses as much as digits as its factorization.

40065250639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002784.

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 40065250639 in words is "forty billion, sixty-five million, two hundred fifty thousand, six hundred thirty-nine".