40205012039 has 4 divisors (see below), whose sum is σ = 41291634024. Its totient is φ = 39118390056.

The previous prime is 40205012033. The next prime is 40205012077. The reversal of 40205012039 is 93021050204.

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

It is a cyclic number.

It is not a de Polignac number, because 40205012039 - 2⁸ = 40205011783 is a prime.

It is a super-2 number, since 2×40205012039² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40205011999 and 40205012017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40205012033) 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 in 3 ways as a sum of consecutive naturals, for example, 543310937 + ... + 543311010.

It is an arithmetic number, because the mean of its divisors is an integer number (10322908506).

Almost surely, 2^40205012039 is an apocalyptic number.

40205012039 is a deficient number, since it is larger than the sum of its proper divisors (1086621985).

40205012039 is a wasteful number, since it uses less digits than its factorization.

40205012039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086621984.

The product of its (nonzero) digits is 2160, while the sum is 26.

The spelling of 40205012039 in words is "forty billion, two hundred five million, twelve thousand, thirty-nine".