12115535481 has 96 divisors (see below), whose sum is σ = 20794475520. Its totient is φ = 6655508352.

The previous prime is 12115535479. The next prime is 12115535507. The reversal of 12115535481 is 18453551121.

12115535481 is a `hidden beast` number, since 1 + 2 + 115 + 535 + 4 + 8 + 1 = 666.

It is not a de Polignac number, because 12115535481 - 2¹ = 12115535479 is a prime.

It is a super-2 number, since 2×12115535481² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12115535431) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 53372290 + ... + 53372516.

It is an arithmetic number, because the mean of its divisors is an integer number (216609120).

Almost surely, 2^12115535481 is an apocalyptic number.

It is an amenable number.

12115535481 is a deficient number, since it is larger than the sum of its proper divisors (8678940039).

12115535481 is a wasteful number, since it uses less digits than its factorization.

12115535481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555 (or 552 counting only the distinct ones).

The product of its digits is 24000, while the sum is 36.

The spelling of 12115535481 in words is "twelve billion, one hundred fifteen million, five hundred thirty-five thousand, four hundred eighty-one".