7901220018697 has 2 divisors, whose sum is σ = 7901220018698. Its totient is φ = 7901220018696.

The previous prime is 7901220018631. The next prime is 7901220018719. The reversal of 7901220018697 is 7968100221097.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7272924410896 + 628295607801 = 2696836^2 + 792651^2 .

It is a cyclic number.

It is not a de Polignac number, because 7901220018697 - 2⁷ = 7901220018569 is a prime.

It is not a weakly prime, because it can be changed into another prime (7901220018607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3950610009348 + 3950610009349.

It is an arithmetic number, because the mean of its divisors is an integer number (3950610009349).

Almost surely, 2^{7901220018697} is an apocalyptic number.

It is an amenable number.

7901220018697 is a deficient number, since it is larger than the sum of its proper divisors (1).

7901220018697 is an equidigital number, since it uses as much as digits as its factorization.

7901220018697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 52.

The spelling of 7901220018697 in words is "seven trillion, nine hundred one billion, two hundred twenty million, eighteen thousand, six hundred ninety-seven".