11270451681 has 12 divisors (see below), whose sum is σ = 16290764308. Its totient is φ = 7508454624.

The previous prime is 11270451671. The next prime is 11270451701. The reversal of 11270451681 is 18615407211.

11270451681 is a `hidden beast` number, since 1 + 127 + 0 + 451 + 6 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10325811456 + 944640225 = 101616^2 + 30735^2 .

It is not a de Polignac number, because 11270451681 - 2⁹ = 11270451169 is a prime.

It is a super-2 number, since 2×11270451681² (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 (11270451601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 417850 + ... + 444003.

Almost surely, 2^11270451681 is an apocalyptic number.

It is an amenable number.

11270451681 is a deficient number, since it is larger than the sum of its proper divisors (5020312627).

11270451681 is a wasteful number, since it uses less digits than its factorization.

11270451681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863312 (or 863309 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

Adding to 11270451681 its reverse (18615407211), we get a palindrome (29885858892).

The spelling of 11270451681 in words is "eleven billion, two hundred seventy million, four hundred fifty-one thousand, six hundred eighty-one".