40905719879 has 2 divisors, whose sum is σ = 40905719880. Its totient is φ = 40905719878.

The previous prime is 40905719851. The next prime is 40905719891. The reversal of 40905719879 is 97891750904.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40905719879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40905719839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20452859939 + 20452859940.

It is an arithmetic number, because the mean of its divisors is an integer number (20452859940).

Almost surely, 2^40905719879 is an apocalyptic number.

40905719879 is a deficient number, since it is larger than the sum of its proper divisors (1).

40905719879 is an equidigital number, since it uses as much as digits as its factorization.

40905719879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5715360, while the sum is 59.

The spelling of 40905719879 in words is "forty billion, nine hundred five million, seven hundred nineteen thousand, eight hundred seventy-nine".