7937778777397 has 16 divisors (see below), whose sum is σ = 9352316713600. Its totient is φ = 6733667977344.

The previous prime is 7937778777389. The next prime is 7937778777431.

7937778777397 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7937778777397 - 2³ = 7937778777389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7937778777377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119256483 + ... + 119323024.

It is an arithmetic number, because the mean of its divisors is an integer number (584519794600).

Almost surely, 2^{7937778777397} is an apocalyptic number.

It is an amenable number.

7937778777397 is a deficient number, since it is larger than the sum of its proper divisors (1414537936203).

7937778777397 is an equidigital number, since it uses as much as digits as its factorization.

7937778777397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238579625 (or 238579611 counting only the distinct ones).

The product of its digits is 33620319432, while the sum is 88.

The spelling of 7937778777397 in words is "seven trillion, nine hundred thirty-seven billion, seven hundred seventy-eight million, seven hundred seventy-seven thousand, three hundred ninety-seven".