12661465212 has 48 divisors (see below), whose sum is σ = 35810208000. Its totient is φ = 3836807280.

The previous prime is 12661465171. The next prime is 12661465259. The reversal of 12661465212 is 21256416621.

12661465212 is a `hidden beast` number, since 1 + 26 + 614 + 6 + 5 + 2 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5327712 + ... + 5330087.

It is an arithmetic number, because the mean of its divisors is an integer number (746046000).

Almost surely, 2^12661465212 is an apocalyptic number.

12661465212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12661465212 is an abundant number, since it is smaller than the sum of its proper divisors (23148742788).

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

12661465212 is a wasteful number, since it uses less digits than its factorization.

12661465212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10657823 (or 10657815 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The spelling of 12661465212 in words is "twelve billion, six hundred sixty-one million, four hundred sixty-five thousand, two hundred twelve".