6940136889281 has 2 divisors, whose sum is σ = 6940136889282. Its totient is φ = 6940136889280.

The previous prime is 6940136889271. The next prime is 6940136889299. The reversal of 6940136889281 is 1829886310496.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3891565017025 + 3048571872256 = 1972705^2 + 1746016^2 .

It is a cyclic number.

It is not a de Polignac number, because 6940136889281 - 2¹⁰ = 6940136888257 is a prime.

It is a super-2 number, since 2×6940136889281² (a number of 26 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6940136889211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3470068444640 + 3470068444641.

It is an arithmetic number, because the mean of its divisors is an integer number (3470068444641).

Almost surely, 2^{6940136889281} is an apocalyptic number.

It is an amenable number.

6940136889281 is a deficient number, since it is larger than the sum of its proper divisors (1).

6940136889281 is an equidigital number, since it uses as much as digits as its factorization.

6940136889281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35831808, while the sum is 65.

The spelling of 6940136889281 in words is "six trillion, nine hundred forty billion, one hundred thirty-six million, eight hundred eighty-nine thousand, two hundred eighty-one".