13785358861 has 2 divisors, whose sum is σ = 13785358862. Its totient is φ = 13785358860.

The previous prime is 13785358849. The next prime is 13785358889. The reversal of 13785358861 is 16885358731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13260674025 + 524684836 = 115155^2 + 22906^2 .

It is a cyclic number.

It is not a de Polignac number, because 13785358861 - 2¹³ = 13785350669 is a prime.

It is a super-2 number, since 2×13785358861² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13785358841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6892679430 + 6892679431.

It is an arithmetic number, because the mean of its divisors is an integer number (6892679431).

Almost surely, 2^13785358861 is an apocalyptic number.

It is an amenable number.

13785358861 is a deficient number, since it is larger than the sum of its proper divisors (1).

13785358861 is an equidigital number, since it uses as much as digits as its factorization.

13785358861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4838400, while the sum is 55.

The spelling of 13785358861 in words is "thirteen billion, seven hundred eighty-five million, three hundred fifty-eight thousand, eight hundred sixty-one".