7978440448797 has 32 divisors (see below), whose sum is σ = 13099336857600. Its totient is φ = 4206315165120.

The previous prime is 7978440448793. The next prime is 7978440448801.

7978440448797 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (7978440448793) and next prime (7978440448801).

It is not a de Polignac number, because 7978440448797 - 2² = 7978440448793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7978440448793) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6717297 + ... + 7815302.

It is an arithmetic number, because the mean of its divisors is an integer number (409354276800).

Almost surely, 2^{7978440448797} is an apocalyptic number.

It is an amenable number.

7978440448797 is a deficient number, since it is larger than the sum of its proper divisors (5120896408803).

7978440448797 is a wasteful number, since it uses less digits than its factorization.

7978440448797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14534633.

The product of its (nonzero) digits is 3186376704, while the sum is 78.

The spelling of 7978440448797 in words is "seven trillion, nine hundred seventy-eight billion, four hundred forty million, four hundred forty-eight thousand, seven hundred ninety-seven".