12655503531 has 32 divisors (see below), whose sum is σ = 20788669440. Its totient is φ = 7544253600.

The previous prime is 12655503521. The next prime is 12655503577. The reversal of 12655503531 is 13530555621.

12655503531 is a `hidden beast` number, since 1 + 26 + 55 + 50 + 3 + 531 = 666.

It is not a de Polignac number, because 12655503531 - 2¹⁴ = 12655487147 is a prime.

It is a super-2 number, since 2×12655503531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12655503521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 331155 + ... + 367388.

It is an arithmetic number, because the mean of its divisors is an integer number (649645920).

Almost surely, 2^12655503531 is an apocalyptic number.

12655503531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12655503531 is a deficient number, since it is larger than the sum of its proper divisors (8133165909).

12655503531 is a wasteful number, since it uses less digits than its factorization.

12655503531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698624 (or 698618 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 36.

The spelling of 12655503531 in words is "twelve billion, six hundred fifty-five million, five hundred three thousand, five hundred thirty-one".