1285693553993 has 2 divisors, whose sum is σ = 1285693553994. Its totient is φ = 1285693553992.

The previous prime is 1285693553923. The next prime is 1285693554001. The reversal of 1285693553993 is 3993553965821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 819372556864 + 466320997129 = 905192^2 + 682877^2 .

It is a cyclic number.

It is not a de Polignac number, because 1285693553993 - 2⁸ = 1285693553737 is a prime.

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 (1285693553923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642846776996 + 642846776997.

It is an arithmetic number, because the mean of its divisors is an integer number (642846776997).

Almost surely, 2^{1285693553993} is an apocalyptic number.

It is an amenable number.

1285693553993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285693553993 is an equidigital number, since it uses as much as digits as its factorization.

1285693553993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 236196000, while the sum is 68.

The spelling of 1285693553993 in words is "one trillion, two hundred eighty-five billion, six hundred ninety-three million, five hundred fifty-three thousand, nine hundred ninety-three".