40881257566 has 4 divisors (see below), whose sum is σ = 61321886352. Its totient is φ = 20440628782.

The previous prime is 40881257513. The next prime is 40881257591. The reversal of 40881257566 is 66575218804.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10220314390 + ... + 10220314393.

It is an arithmetic number, because the mean of its divisors is an integer number (15330471588).

Almost surely, 2^40881257566 is an apocalyptic number.

40881257566 is a deficient number, since it is larger than the sum of its proper divisors (20440628786).

40881257566 is a wasteful number, since it uses less digits than its factorization.

40881257566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20440628785.

The product of its (nonzero) digits is 3225600, while the sum is 52.

The spelling of 40881257566 in words is "forty billion, eight hundred eighty-one million, two hundred fifty-seven thousand, five hundred sixty-six".