1694195137121 has 2 divisors, whose sum is σ = 1694195137122. Its totient is φ = 1694195137120.

The previous prime is 1694195137079. The next prime is 1694195137163. The reversal of 1694195137121 is 1217315914961.

It is a balanced prime because it is at equal distance from previous prime (1694195137079) and next prime (1694195137163).

It can be written as a sum of positive squares in only one way, i.e., 1640896950625 + 53298186496 = 1280975^2 + 230864^2 .

It is a cyclic number.

It is not a de Polignac number, because 1694195137121 - 2⁶ = 1694195137057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1694195137121.

It is not a weakly prime, because it can be changed into another prime (1694195187121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 847097568560 + 847097568561.

It is an arithmetic number, because the mean of its divisors is an integer number (847097568561).

Almost surely, 2^{1694195137121} is an apocalyptic number.

It is an amenable number.

1694195137121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1694195137121 is an equidigital number, since it uses as much as digits as its factorization.

1694195137121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 50.

The spelling of 1694195137121 in words is "one trillion, six hundred ninety-four billion, one hundred ninety-five million, one hundred thirty-seven thousand, one hundred twenty-one".