40494889663 has 2 divisors, whose sum is σ = 40494889664. Its totient is φ = 40494889662.

The previous prime is 40494889657. The next prime is 40494889679. The reversal of 40494889663 is 36698849404.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40494889663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40494889063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20247444831 + 20247444832.

It is an arithmetic number, because the mean of its divisors is an integer number (20247444832).

Almost surely, 2^40494889663 is an apocalyptic number.

40494889663 is a deficient number, since it is larger than the sum of its proper divisors (1).

40494889663 is an equidigital number, since it uses as much as digits as its factorization.

40494889663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35831808, while the sum is 61.

The spelling of 40494889663 in words is "forty billion, four hundred ninety-four million, eight hundred eighty-nine thousand, six hundred sixty-three".