7813228664177 has 2 divisors, whose sum is σ = 7813228664178. Its totient is φ = 7813228664176.

The previous prime is 7813228664147. The next prime is 7813228664287. The reversal of 7813228664177 is 7714668223187.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4968757523041 + 2844471141136 = 2229071^2 + 1686556^2 .

It is a cyclic number.

It is not a de Polignac number, because 7813228664177 - 2³⁴ = 7796048794993 is a prime.

It is a super-2 number, since 2×7813228664177² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7813228664147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3906614332088 + 3906614332089.

It is an arithmetic number, because the mean of its divisors is an integer number (3906614332089).

Almost surely, 2^{7813228664177} is an apocalyptic number.

It is an amenable number.

7813228664177 is a deficient number, since it is larger than the sum of its proper divisors (1).

7813228664177 is an equidigital number, since it uses as much as digits as its factorization.

7813228664177 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37933056, while the sum is 62.

The spelling of 7813228664177 in words is "seven trillion, eight hundred thirteen billion, two hundred twenty-eight million, six hundred sixty-four thousand, one hundred seventy-seven".