40781061071 has 2 divisors, whose sum is σ = 40781061072. Its totient is φ = 40781061070.

The previous prime is 40781061049. The next prime is 40781061073. The reversal of 40781061071 is 17016018704.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40781061071 is a prime.

Together with 40781061073, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40781061073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20390530535 + 20390530536.

It is an arithmetic number, because the mean of its divisors is an integer number (20390530536).

Almost surely, 2^40781061071 is an apocalyptic number.

40781061071 is a deficient number, since it is larger than the sum of its proper divisors (1).

40781061071 is an equidigital number, since it uses as much as digits as its factorization.

40781061071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 35.

Adding to 40781061071 its reverse (17016018704), we get a palindrome (57797079775).

The spelling of 40781061071 in words is "forty billion, seven hundred eighty-one million, sixty-one thousand, seventy-one".