7810920745601 has 2 divisors, whose sum is σ = 7810920745602. Its totient is φ = 7810920745600.

The previous prime is 7810920745597. The next prime is 7810920745637. The reversal of 7810920745601 is 1065470290187.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7260200914576 + 550719831025 = 2694476^2 + 742105^2 .

It is a cyclic number.

It is not a de Polignac number, because 7810920745601 - 2² = 7810920745597 is a prime.

It is a super-2 number, since 2×7810920745601² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7810920745601.

It is not a weakly prime, because it can be changed into another prime (7810920745651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3905460372800 + 3905460372801.

It is an arithmetic number, because the mean of its divisors is an integer number (3905460372801).

Almost surely, 2^{7810920745601} is an apocalyptic number.

It is an amenable number.

7810920745601 is a deficient number, since it is larger than the sum of its proper divisors (1).

7810920745601 is an equidigital number, since it uses as much as digits as its factorization.

7810920745601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 846720, while the sum is 50.

The spelling of 7810920745601 in words is "seven trillion, eight hundred ten billion, nine hundred twenty million, seven hundred forty-five thousand, six hundred one".