40243255566 has 8 divisors (see below), whose sum is σ = 80486511144. Its totient is φ = 13414418520.

The previous prime is 40243255541. The next prime is 40243255573. The reversal of 40243255566 is 66555234204.

It is a sphenic number, since it is the product of 3 distinct primes.

40243255566 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3353604625 + ... + 3353604636.

It is an arithmetic number, because the mean of its divisors is an integer number (10060813893).

Almost surely, 2^40243255566 is an apocalyptic number.

40243255566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40243255566 is a wasteful number, since it uses less digits than its factorization.

40243255566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6707209266.

The product of its (nonzero) digits is 864000, while the sum is 42.

The spelling of 40243255566 in words is "forty billion, two hundred forty-three million, two hundred fifty-five thousand, five hundred sixty-six".