40127038398709 has 2 divisors, whose sum is σ = 40127038398710. Its totient is φ = 40127038398708.

The previous prime is 40127038398653. The next prime is 40127038398751. The reversal of 40127038398709 is 90789383072104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39915418158225 + 211620240484 = 6317865^2 + 460022^2 .

It is a cyclic number.

It is not a de Polignac number, because 40127038398709 - 2³³ = 40118448464117 is a prime.

It is a super-2 number, since 2×40127038398709² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40127038398509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20063519199354 + 20063519199355.

It is an arithmetic number, because the mean of its divisors is an integer number (20063519199355).

Almost surely, 2^{40127038398709} is an apocalyptic number.

It is an amenable number.

40127038398709 is a deficient number, since it is larger than the sum of its proper divisors (1).

40127038398709 is an equidigital number, since it uses as much as digits as its factorization.

40127038398709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18289152, while the sum is 61.

The spelling of 40127038398709 in words is "forty trillion, one hundred twenty-seven billion, thirty-eight million, three hundred ninety-eight thousand, seven hundred nine".