12540603216 has 20 divisors (see below), whose sum is σ = 32396558432. Its totient is φ = 4180201056.

The previous prime is 12540603209. The next prime is 12540603217. The reversal of 12540603216 is 61230604521.

It is a super-2 number, since 2×12540603216² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12540603217) 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 3 ways as a sum of consecutive naturals, for example, 130631236 + ... + 130631331.

Almost surely, 2^12540603216 is an apocalyptic number.

12540603216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12540603216 is an abundant number, since it is smaller than the sum of its proper divisors (19855955216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12540603216 is a wasteful number, since it uses less digits than its factorization.

12540603216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261262578 (or 261262572 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 12540603216 in words is "twelve billion, five hundred forty million, six hundred three thousand, two hundred sixteen".