40821577663 has 2 divisors, whose sum is σ = 40821577664. Its totient is φ = 40821577662.

The previous prime is 40821577637. The next prime is 40821577703. The reversal of 40821577663 is 36677512804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40821577663 - 2⁵ = 40821577631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40821077663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20410788831 + 20410788832.

It is an arithmetic number, because the mean of its divisors is an integer number (20410788832).

Almost surely, 2^40821577663 is an apocalyptic number.

40821577663 is a deficient number, since it is larger than the sum of its proper divisors (1).

40821577663 is an equidigital number, since it uses as much as digits as its factorization.

40821577663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 40821577663 in words is "forty billion, eight hundred twenty-one million, five hundred seventy-seven thousand, six hundred sixty-three".