11488521681 has 224 divisors, whose sum is σ = 22951531008. Its totient is φ = 5576325120.

The previous prime is 11488521679. The next prime is 11488521731. The reversal of 11488521681 is 18612588411.

11488521681 is a `hidden beast` number, since 1 + 1 + 48 + 8 + 521 + 6 + 81 = 666.

It is not a de Polignac number, because 11488521681 - 2¹ = 11488521679 is a prime.

It is a super-2 number, since 2×11488521681² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11488521641) by changing a digit.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 68793460 + ... + 68793626.

It is an arithmetic number, because the mean of its divisors is an integer number (102462192).

Almost surely, 2^11488521681 is an apocalyptic number.

It is an amenable number.

11488521681 is a deficient number, since it is larger than the sum of its proper divisors (11463009327).

11488521681 is a wasteful number, since it uses less digits than its factorization.

11488521681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 268 counting only the distinct ones).

The product of its digits is 122880, while the sum is 45.

The spelling of 11488521681 in words is "eleven billion, four hundred eighty-eight million, five hundred twenty-one thousand, six hundred eighty-one".