40802563 has 2 divisors, whose sum is σ = 40802564. Its totient is φ = 40802562.

The previous prime is 40802561. The next prime is 40802647. The reversal of 40802563 is 36520804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40802563 - 2¹ = 40802561 is a prime.

Together with 40802561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40802561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20401281 + 20401282.

It is an arithmetic number, because the mean of its divisors is an integer number (20401282).

Almost surely, 2^40802563 is an apocalyptic number.

40802563 is a deficient number, since it is larger than the sum of its proper divisors (1).

40802563 is an equidigital number, since it uses as much as digits as its factorization.

40802563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 40802563 is about 6387.6883925251. The cubic root of 40802563 is about 344.2673326438.

The spelling of 40802563 in words is "forty million, eight hundred two thousand, five hundred sixty-three".