40563861 has 16 divisors (see below), whose sum is σ = 58449216. Its totient is φ = 24875136.

The previous prime is 40563833. The next prime is 40563863. The reversal of 40563861 is 16836504.

It is not a de Polignac number, because 40563861 - 2⁹ = 40563349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40563863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10546 + ... + 13868.

It is an arithmetic number, because the mean of its divisors is an integer number (3653076).

Almost surely, 2^40563861 is an apocalyptic number.

It is an amenable number.

40563861 is a deficient number, since it is larger than the sum of its proper divisors (17885355).

40563861 is a wasteful number, since it uses less digits than its factorization.

40563861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3652.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 40563861 is about 6368.9764483785. The cubic root of 40563861 is about 343.5946782148.

The spelling of 40563861 in words is "forty million, five hundred sixty-three thousand, eight hundred sixty-one".