7820163401 has 2 divisors, whose sum is σ = 7820163402. Its totient is φ = 7820163400.

The previous prime is 7820163397. The next prime is 7820163433. The reversal of 7820163401 is 1043610287.

It is an a-pointer prime, because the next prime (7820163433) can be obtained adding 7820163401 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6210228025 + 1609935376 = 78805^2 + 40124^2 .

It is a cyclic number.

It is not a de Polignac number, because 7820163401 - 2² = 7820163397 is a prime.

It is a super-2 number, since 2×7820163401² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7820165401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3910081700 + 3910081701.

It is an arithmetic number, because the mean of its divisors is an integer number (3910081701).

Almost surely, 2^7820163401 is an apocalyptic number.

It is an amenable number.

7820163401 is a deficient number, since it is larger than the sum of its proper divisors (1).

7820163401 is an equidigital number, since it uses as much as digits as its factorization.

7820163401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 7820163401 is about 88431.6877651897. The cubic root of 7820163401 is about 1984.8998971149.

Adding to 7820163401 its reverse (1043610287), we get a palindrome (8863773688).

The spelling of 7820163401 in words is "seven billion, eight hundred twenty million, one hundred sixty-three thousand, four hundred one".