11201985637 has 2 divisors, whose sum is σ = 11201985638. Its totient is φ = 11201985636.

The previous prime is 11201985611. The next prime is 11201985659. The reversal of 11201985637 is 73658910211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7772009281 + 3429976356 = 88159^2 + 58566^2 .

It is a cyclic number.

It is not a de Polignac number, because 11201985637 - 2¹¹ = 11201983589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11201985593 and 11201985602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11201985937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5600992818 + 5600992819.

It is an arithmetic number, because the mean of its divisors is an integer number (5600992819).

Almost surely, 2^11201985637 is an apocalyptic number.

It is an amenable number.

11201985637 is a deficient number, since it is larger than the sum of its proper divisors (1).

11201985637 is an equidigital number, since it uses as much as digits as its factorization.

11201985637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 11201985637 in words is "eleven billion, two hundred one million, nine hundred eighty-five thousand, six hundred thirty-seven".