7147147696781 has 2 divisors, whose sum is σ = 7147147696782. Its totient is φ = 7147147696780.

The previous prime is 7147147696729. The next prime is 7147147696813. The reversal of 7147147696781 is 1876967417417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5807883102025 + 1339264594756 = 2409955^2 + 1157266^2 .

It is a cyclic number.

It is not a de Polignac number, because 7147147696781 - 2¹⁴ = 7147147680397 is a prime.

It is a super-2 number, since 2×7147147696781² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7147147693781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3573573848390 + 3573573848391.

It is an arithmetic number, because the mean of its divisors is an integer number (3573573848391).

Almost surely, 2^{7147147696781} is an apocalyptic number.

It is an amenable number.

7147147696781 is a deficient number, since it is larger than the sum of its proper divisors (1).

7147147696781 is an equidigital number, since it uses as much as digits as its factorization.

7147147696781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 99574272, while the sum is 68.

The spelling of 7147147696781 in words is "seven trillion, one hundred forty-seven billion, one hundred forty-seven million, six hundred ninety-six thousand, seven hundred eighty-one".