694437562649 has 2 divisors, whose sum is σ = 694437562650. Its totient is φ = 694437562648.

The previous prime is 694437562603. The next prime is 694437562697. The reversal of 694437562649 is 946265734496.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 590389383424 + 104048179225 = 768368^2 + 322565^2 .

It is a cyclic number.

It is not a de Polignac number, because 694437562649 - 2⁸ = 694437562393 is a prime.

It is a super-3 number, since 3×694437562649³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (694437562349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347218781324 + 347218781325.

It is an arithmetic number, because the mean of its divisors is an integer number (347218781325).

Almost surely, 2^694437562649 is an apocalyptic number.

It is an amenable number.

694437562649 is a deficient number, since it is larger than the sum of its proper divisors (1).

694437562649 is an equidigital number, since it uses as much as digits as its factorization.

694437562649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 235146240, while the sum is 65.

The spelling of 694437562649 in words is "six hundred ninety-four billion, four hundred thirty-seven million, five hundred sixty-two thousand, six hundred forty-nine".