13775748481 has 6 divisors (see below), whose sum is σ = 15141938546. Its totient is φ = 12523407600.

The previous prime is 13775748451. The next prime is 13775748487. The reversal of 13775748481 is 18484757731.

It can be written as a sum of positive squares in only one way, i.e., 13452288256 + 323460225 = 115984^2 + 17985^2 .

It is not a de Polignac number, because 13775748481 - 2²¹ = 13773651329 is a prime.

It is a super-2 number, since 2×13775748481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13775748487) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56924460 + ... + 56924701.

Almost surely, 2^13775748481 is an apocalyptic number.

13775748481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13775748481 is a deficient number, since it is larger than the sum of its proper divisors (1366190065).

13775748481 is a wasteful number, since it uses less digits than its factorization.

13775748481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113849183 (or 113849172 counting only the distinct ones).

The product of its digits is 5268480, while the sum is 55.

The spelling of 13775748481 in words is "thirteen billion, seven hundred seventy-five million, seven hundred forty-eight thousand, four hundred eighty-one".