40350221565 has 16 divisors (see below), whose sum is σ = 68358022848. Its totient is φ = 20254228736.

The previous prime is 40350221543. The next prime is 40350221567. The reversal of 40350221565 is 56512205304.

It is a cyclic number.

It is not a de Polignac number, because 40350221565 - 2¹³ = 40350213373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40350221567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79117827 + ... + 79118336.

It is an arithmetic number, because the mean of its divisors is an integer number (4272376428).

Almost surely, 2^40350221565 is an apocalyptic number.

It is an amenable number.

40350221565 is a deficient number, since it is larger than the sum of its proper divisors (28007801283).

40350221565 is a wasteful number, since it uses less digits than its factorization.

40350221565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158236188.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 40350221565 its reverse (56512205304), we get a palindrome (96862426869).

The spelling of 40350221565 in words is "forty billion, three hundred fifty million, two hundred twenty-one thousand, five hundred sixty-five".