985386601561 has 2 divisors, whose sum is σ = 985386601562. Its totient is φ = 985386601560.

The previous prime is 985386601477. The next prime is 985386601601. The reversal of 985386601561 is 165106683589.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 928561577161 + 56825024400 = 963619^2 + 238380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985386601561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 985386601496 and 985386601505.

It is not a weakly prime, because it can be changed into another prime (985386602561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492693300780 + 492693300781.

It is an arithmetic number, because the mean of its divisors is an integer number (492693300781).

Almost surely, 2^985386601561 is an apocalyptic number.

It is an amenable number.

985386601561 is a deficient number, since it is larger than the sum of its proper divisors (1).

985386601561 is an equidigital number, since it uses as much as digits as its factorization.

985386601561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9331200, while the sum is 58.

The spelling of 985386601561 in words is "nine hundred eighty-five billion, three hundred eighty-six million, six hundred one thousand, five hundred sixty-one".