694440837361 has 2 divisors, whose sum is σ = 694440837362. Its totient is φ = 694440837360.

The previous prime is 694440837283. The next prime is 694440837373. The reversal of 694440837361 is 163738044496.

694440837361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 642522480625 + 51918356736 = 801575^2 + 227856^2 .

It is a cyclic number.

It is not a de Polignac number, because 694440837361 - 2¹¹ = 694440835313 is a prime.

It is not a weakly prime, because it can be changed into another prime (694440837161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347220418680 + 347220418681.

It is an arithmetic number, because the mean of its divisors is an integer number (347220418681).

Almost surely, 2^694440837361 is an apocalyptic number.

It is an amenable number.

694440837361 is a deficient number, since it is larger than the sum of its proper divisors (1).

694440837361 is an equidigital number, since it uses as much as digits as its factorization.

694440837361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10450944, while the sum is 55.

The spelling of 694440837361 in words is "six hundred ninety-four billion, four hundred forty million, eight hundred thirty-seven thousand, three hundred sixty-one".