9476940931781 has 2 divisors, whose sum is σ = 9476940931782. Its totient is φ = 9476940931780.

The previous prime is 9476940931741. The next prime is 9476940931853. The reversal of 9476940931781 is 1871390496749.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5079573871681 + 4397367060100 = 2253791^2 + 2096990^2 .

It is a cyclic number.

It is not a de Polignac number, because 9476940931781 - 2¹⁰ = 9476940930757 is a prime.

It is a super-2 number, since 2×9476940931781² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9476940931741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4738470465890 + 4738470465891.

It is an arithmetic number, because the mean of its divisors is an integer number (4738470465891).

Almost surely, 2^{9476940931781} is an apocalyptic number.

It is an amenable number.

9476940931781 is a deficient number, since it is larger than the sum of its proper divisors (1).

9476940931781 is an equidigital number, since it uses as much as digits as its factorization.

9476940931781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82301184, while the sum is 68.

The spelling of 9476940931781 in words is "nine trillion, four hundred seventy-six billion, nine hundred forty million, nine hundred thirty-one thousand, seven hundred eighty-one".