1985963574853 has 2 divisors, whose sum is σ = 1985963574854. Its totient is φ = 1985963574852.

The previous prime is 1985963574823. The next prime is 1985963574923. The reversal of 1985963574853 is 3584753695891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1243708957089 + 742254617764 = 1115217^2 + 861542^2 .

It is a cyclic number.

It is not a de Polignac number, because 1985963574853 - 2³⁷ = 1848524621381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1985963574823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992981787426 + 992981787427.

It is an arithmetic number, because the mean of its divisors is an integer number (992981787427).

Almost surely, 2^{1985963574853} is an apocalyptic number.

It is an amenable number.

1985963574853 is a deficient number, since it is larger than the sum of its proper divisors (1).

1985963574853 is an equidigital number, since it uses as much as digits as its factorization.

1985963574853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776000, while the sum is 73.

The spelling of 1985963574853 in words is "one trillion, nine hundred eighty-five billion, nine hundred sixty-three million, five hundred seventy-four thousand, eight hundred fifty-three".