7816918820201 has 2 divisors, whose sum is σ = 7816918820202. Its totient is φ = 7816918820200.

The previous prime is 7816918820167. The next prime is 7816918820237. The reversal of 7816918820201 is 1020288196187.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6035748314176 + 1781170506025 = 2456776^2 + 1334605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7816918820201 is a prime.

It is a super-2 number, since 2×7816918820201² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7816918820281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3908459410100 + 3908459410101.

It is an arithmetic number, because the mean of its divisors is an integer number (3908459410101).

Almost surely, 2^{7816918820201} is an apocalyptic number.

It is an amenable number.

7816918820201 is a deficient number, since it is larger than the sum of its proper divisors (1).

7816918820201 is an equidigital number, since it uses as much as digits as its factorization.

7816918820201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 53.

The spelling of 7816918820201 in words is "seven trillion, eight hundred sixteen billion, nine hundred eighteen million, eight hundred twenty thousand, two hundred one".