7148738373781 has 2 divisors, whose sum is σ = 7148738373782. Its totient is φ = 7148738373780.

The previous prime is 7148738373731. The next prime is 7148738373827. The reversal of 7148738373781 is 1873738378417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4430414571025 + 2718323802756 = 2104855^2 + 1648734^2 .

It is a cyclic number.

It is not a de Polignac number, because 7148738373781 - 2¹⁹ = 7148737849493 is a prime.

It is a super-2 number, since 2×7148738373781² (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 (7148738373731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3574369186890 + 3574369186891.

It is an arithmetic number, because the mean of its divisors is an integer number (3574369186891).

Almost surely, 2^{7148738373781} is an apocalyptic number.

It is an amenable number.

7148738373781 is a deficient number, since it is larger than the sum of its proper divisors (1).

7148738373781 is an equidigital number, since it uses as much as digits as its factorization.

7148738373781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132765696, while the sum is 67.

The spelling of 7148738373781 in words is "seven trillion, one hundred forty-eight billion, seven hundred thirty-eight million, three hundred seventy-three thousand, seven hundred eighty-one".