40026447393781 has 2 divisors, whose sum is σ = 40026447393782. Its totient is φ = 40026447393780.

The previous prime is 40026447393727. The next prime is 40026447393797. The reversal of 40026447393781 is 18739374462004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39833580618225 + 192866775556 = 6311385^2 + 439166^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40026447393781 is a prime.

It is a super-3 number, since 3×40026447393781³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40026447393181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20013223696890 + 20013223696891.

It is an arithmetic number, because the mean of its divisors is an integer number (20013223696891).

Almost surely, 2^{40026447393781} is an apocalyptic number.

It is an amenable number.

40026447393781 is a deficient number, since it is larger than the sum of its proper divisors (1).

40026447393781 is an equidigital number, since it uses as much as digits as its factorization.

40026447393781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24385536, while the sum is 58.

The spelling of 40026447393781 in words is "forty trillion, twenty-six billion, four hundred forty-seven million, three hundred ninety-three thousand, seven hundred eighty-one".