40634694563 has 2 divisors, whose sum is σ = 40634694564. Its totient is φ = 40634694562.

The previous prime is 40634694557. The next prime is 40634694599. The reversal of 40634694563 is 36549643604.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40634694563 - 2⁴ = 40634694547 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (40634694553) 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 as a sum of consecutive naturals, namely, 20317347281 + 20317347282.

It is an arithmetic number, because the mean of its divisors is an integer number (20317347282).

Almost surely, 2^40634694563 is an apocalyptic number.

40634694563 is a deficient number, since it is larger than the sum of its proper divisors (1).

40634694563 is an equidigital number, since it uses as much as digits as its factorization.

40634694563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5598720, while the sum is 50.

The spelling of 40634694563 in words is "forty billion, six hundred thirty-four million, six hundred ninety-four thousand, five hundred sixty-three".