40765805779 has 2 divisors, whose sum is σ = 40765805780. Its totient is φ = 40765805778.

The previous prime is 40765805777. The next prime is 40765805803. The reversal of 40765805779 is 97750856704.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40765805779 - 2¹ = 40765805777 is a prime.

It is a super-2 number, since 2×40765805779² (a number of 22 digits) contains 22 as substring.

Together with 40765805777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40765805777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20382902889 + 20382902890.

It is an arithmetic number, because the mean of its divisors is an integer number (20382902890).

Almost surely, 2^40765805779 is an apocalyptic number.

40765805779 is a deficient number, since it is larger than the sum of its proper divisors (1).

40765805779 is an equidigital number, since it uses as much as digits as its factorization.

40765805779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14817600, while the sum is 58.

The spelling of 40765805779 in words is "forty billion, seven hundred sixty-five million, eight hundred five thousand, seven hundred seventy-nine".