7816491446399 has 12 divisors (see below), whose sum is σ = 8014386459840. Its totient is φ = 7623371539200.

The previous prime is 7816491446341. The next prime is 7816491446417. The reversal of 7816491446399 is 9936441946187.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-7816491446399 is a prime.

It is a super-2 number, since 2×7816491446399² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7816494446399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4439954 + ... + 5945264.

It is an arithmetic number, because the mean of its divisors is an integer number (667865538320).

Almost surely, 2^{7816491446399} is an apocalyptic number.

7816491446399 is a deficient number, since it is larger than the sum of its proper divisors (197895013441).

7816491446399 is a wasteful number, since it uses less digits than its factorization.

7816491446399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508482 (or 1508441 counting only the distinct ones).

The product of its digits is 282175488, while the sum is 71.

The spelling of 7816491446399 in words is "seven trillion, eight hundred sixteen billion, four hundred ninety-one million, four hundred forty-six thousand, three hundred ninety-nine".