40551866879 has 2 divisors, whose sum is σ = 40551866880. Its totient is φ = 40551866878.

The previous prime is 40551866869. The next prime is 40551866891. The reversal of 40551866879 is 97866815504.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40551866879 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40551866869) by changing a digit.

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, 20275933439 + 20275933440.

It is an arithmetic number, because the mean of its divisors is an integer number (20275933440).

Almost surely, 2^40551866879 is an apocalyptic number.

40551866879 is a deficient number, since it is larger than the sum of its proper divisors (1).

40551866879 is an equidigital number, since it uses as much as digits as its factorization.

40551866879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14515200, while the sum is 59.

The spelling of 40551866879 in words is "forty billion, five hundred fifty-one million, eight hundred sixty-six thousand, eight hundred seventy-nine".