1953581354663 has 2 divisors, whose sum is σ = 1953581354664. Its totient is φ = 1953581354662.

The previous prime is 1953581354657. The next prime is 1953581354723. The reversal of 1953581354663 is 3664531853591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1953581354663 - 2³⁴ = 1936401485479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1953581354363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976790677331 + 976790677332.

It is an arithmetic number, because the mean of its divisors is an integer number (976790677332).

Almost surely, 2^{1953581354663} is an apocalyptic number.

1953581354663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1953581354663 is an equidigital number, since it uses as much as digits as its factorization.

1953581354663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992000, while the sum is 59.

The spelling of 1953581354663 in words is "one trillion, nine hundred fifty-three billion, five hundred eighty-one million, three hundred fifty-four thousand, six hundred sixty-three".