40642563 has 32 divisors (see below), whose sum is σ = 62899200. Its totient is φ = 23118336.

The previous prime is 40642549. The next prime is 40642571. The reversal of 40642563 is 36524604.

It is not a de Polignac number, because 40642563 - 2⁶ = 40642499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40642563.

It is not an unprimeable number, because it can be changed into a prime (40642363) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38598 + ... + 39636.

It is an arithmetic number, because the mean of its divisors is an integer number (1965600).

Almost surely, 2^40642563 is an apocalyptic number.

40642563 is a deficient number, since it is larger than the sum of its proper divisors (22256637).

40642563 is a wasteful number, since it uses less digits than its factorization.

40642563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 40642563 is about 6375.1519981880. The cubic root of 40642563 is about 343.8167487790.

The spelling of 40642563 in words is "forty million, six hundred forty-two thousand, five hundred sixty-three".