7838056129861 has 2 divisors, whose sum is σ = 7838056129862. Its totient is φ = 7838056129860.

The previous prime is 7838056129847. The next prime is 7838056129873. The reversal of 7838056129861 is 1689216508387.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6885538688961 + 952517440900 = 2624031^2 + 975970^2 .

It is a cyclic number.

It is not a de Polignac number, because 7838056129861 - 2⁹ = 7838056129349 is a prime.

It is a super-2 number, since 2×7838056129861² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7838056129793 and 7838056129802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7838056129061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3919028064930 + 3919028064931.

It is an arithmetic number, because the mean of its divisors is an integer number (3919028064931).

Almost surely, 2^{7838056129861} is an apocalyptic number.

It is an amenable number.

7838056129861 is a deficient number, since it is larger than the sum of its proper divisors (1).

7838056129861 is an equidigital number, since it uses as much as digits as its factorization.

7838056129861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34836480, while the sum is 64.

The spelling of 7838056129861 in words is "seven trillion, eight hundred thirty-eight billion, fifty-six million, one hundred twenty-nine thousand, eight hundred sixty-one".