13890526281 has 12 divisors (see below), whose sum is σ = 20289533940. Its totient is φ = 9156301440.

The previous prime is 13890526271. The next prime is 13890526297. The reversal of 13890526281 is 18262509831.

13890526281 is a `hidden beast` number, since 1 + 38 + 90 + 526 + 2 + 8 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8608870656 + 5281655625 = 92784^2 + 72675^2 .

It is not a de Polignac number, because 13890526281 - 2¹¹ = 13890524233 is a prime.

It is a super-2 number, since 2×13890526281² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13890526201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8669940 + ... + 8671541.

It is an arithmetic number, because the mean of its divisors is an integer number (1690794495).

Almost surely, 2^13890526281 is an apocalyptic number.

It is an amenable number.

13890526281 is a deficient number, since it is larger than the sum of its proper divisors (6399007659).

13890526281 is a wasteful number, since it uses less digits than its factorization.

13890526281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17341576 (or 17341573 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 13890526281 in words is "thirteen billion, eight hundred ninety million, five hundred twenty-six thousand, two hundred eighty-one".