40205735839 has 2 divisors, whose sum is σ = 40205735840. Its totient is φ = 40205735838.

The previous prime is 40205735831. The next prime is 40205735861. The reversal of 40205735839 is 93853750204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40205735839 - 2³ = 40205735831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40205735831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20102867919 + 20102867920.

It is an arithmetic number, because the mean of its divisors is an integer number (20102867920).

Almost surely, 2^40205735839 is an apocalyptic number.

40205735839 is a deficient number, since it is larger than the sum of its proper divisors (1).

40205735839 is an equidigital number, since it uses as much as digits as its factorization.

40205735839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 40205735839 in words is "forty billion, two hundred five million, seven hundred thirty-five thousand, eight hundred thirty-nine".