9404388691249 has 2 divisors, whose sum is σ = 9404388691250. Its totient is φ = 9404388691248.

The previous prime is 9404388691231. The next prime is 9404388691307. The reversal of 9404388691249 is 9421968834049.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6421662810000 + 2982725881249 = 2534100^2 + 1727057^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9404388691249 is a prime.

It is not a weakly prime, because it can be changed into another prime (9404388692249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4702194345624 + 4702194345625.

It is an arithmetic number, because the mean of its divisors is an integer number (4702194345625).

Almost surely, 2^{9404388691249} is an apocalyptic number.

It is an amenable number.

9404388691249 is a deficient number, since it is larger than the sum of its proper divisors (1).

9404388691249 is an equidigital number, since it uses as much as digits as its factorization.

9404388691249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107495424, while the sum is 67.

The spelling of 9404388691249 in words is "nine trillion, four hundred four billion, three hundred eighty-eight million, six hundred ninety-one thousand, two hundred forty-nine".