7720628371097 has 2 divisors, whose sum is σ = 7720628371098. Its totient is φ = 7720628371096.

The previous prime is 7720628371033. The next prime is 7720628371121. The reversal of 7720628371097 is 7901738260277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6040245051481 + 1680383319616 = 2457691^2 + 1296296^2 .

It is a cyclic number.

It is not a de Polignac number, because 7720628371097 - 2⁶ = 7720628371033 is a prime.

It is not a weakly prime, because it can be changed into another prime (7720628371997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3860314185548 + 3860314185549.

It is an arithmetic number, because the mean of its divisors is an integer number (3860314185549).

Almost surely, 2^{7720628371097} is an apocalyptic number.

It is an amenable number.

7720628371097 is a deficient number, since it is larger than the sum of its proper divisors (1).

7720628371097 is an equidigital number, since it uses as much as digits as its factorization.

7720628371097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12446784, while the sum is 59.

The spelling of 7720628371097 in words is "seven trillion, seven hundred twenty billion, six hundred twenty-eight million, three hundred seventy-one thousand, ninety-seven".