7834126457081 has 2 divisors, whose sum is σ = 7834126457082. Its totient is φ = 7834126457080.

The previous prime is 7834126457077. The next prime is 7834126457107. The reversal of 7834126457081 is 1807546214387.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4154194017856 + 3679932439225 = 2038184^2 + 1918315^2 .

It is a cyclic number.

It is not a de Polignac number, because 7834126457081 - 2² = 7834126457077 is a prime.

It is a super-2 number, since 2×7834126457081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7834126450081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3917063228540 + 3917063228541.

It is an arithmetic number, because the mean of its divisors is an integer number (3917063228541).

Almost surely, 2^{7834126457081} is an apocalyptic number.

It is an amenable number.

7834126457081 is a deficient number, since it is larger than the sum of its proper divisors (1).

7834126457081 is an equidigital number, since it uses as much as digits as its factorization.

7834126457081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 7834126457081 in words is "seven trillion, eight hundred thirty-four billion, one hundred twenty-six million, four hundred fifty-seven thousand, eighty-one".