13532017781 has 2 divisors, whose sum is σ = 13532017782. Its totient is φ = 13532017780.

The previous prime is 13532017771. The next prime is 13532017789. The reversal of 13532017781 is 18771023531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11830042756 + 1701975025 = 108766^2 + 41255^2 .

It is a cyclic number.

It is not a de Polignac number, because 13532017781 - 2¹⁴ = 13532001397 is a prime.

It is a super-2 number, since 2×13532017781² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13532017789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6766008890 + 6766008891.

It is an arithmetic number, because the mean of its divisors is an integer number (6766008891).

Almost surely, 2^13532017781 is an apocalyptic number.

It is an amenable number.

13532017781 is a deficient number, since it is larger than the sum of its proper divisors (1).

13532017781 is an equidigital number, since it uses as much as digits as its factorization.

13532017781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 38.

The spelling of 13532017781 in words is "thirteen billion, five hundred thirty-two million, seventeen thousand, seven hundred eighty-one".