7900386943777 has 2 divisors, whose sum is σ = 7900386943778. Its totient is φ = 7900386943776.

The previous prime is 7900386943651. The next prime is 7900386943789. The reversal of 7900386943777 is 7773496830097.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7845466552576 + 54920391201 = 2800976^2 + 234351^2 .

It is a cyclic number.

It is not a de Polignac number, because 7900386943777 - 2²⁷ = 7900252726049 is a prime.

It is a super-2 number, since 2×7900386943777² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7900386943177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3950193471888 + 3950193471889.

It is an arithmetic number, because the mean of its divisors is an integer number (3950193471889).

Almost surely, 2^{7900386943777} is an apocalyptic number.

It is an amenable number.

7900386943777 is a deficient number, since it is larger than the sum of its proper divisors (1).

7900386943777 is an equidigital number, since it uses as much as digits as its factorization.

7900386943777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336063168, while the sum is 70.

The spelling of 7900386943777 in words is "seven trillion, nine hundred billion, three hundred eighty-six million, nine hundred forty-three thousand, seven hundred seventy-seven".