38631402709 has 2 divisors, whose sum is σ = 38631402710. Its totient is φ = 38631402708.

The previous prime is 38631402629. The next prime is 38631402731. The reversal of 38631402709 is 90720413683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37675974609 + 955428100 = 194103^2 + 30910^2 .

It is a cyclic number.

It is not a de Polignac number, because 38631402709 - 2⁹ = 38631402197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38631402739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19315701354 + 19315701355.

It is an arithmetic number, because the mean of its divisors is an integer number (19315701355).

Almost surely, 2^38631402709 is an apocalyptic number.

It is an amenable number.

38631402709 is a deficient number, since it is larger than the sum of its proper divisors (1).

38631402709 is an equidigital number, since it uses as much as digits as its factorization.

38631402709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 38631402709 in words is "thirty-eight billion, six hundred thirty-one million, four hundred two thousand, seven hundred nine".