12747046640 has 20 divisors (see below), whose sum is σ = 29636883624. Its totient is φ = 5098818624.

The previous prime is 12747046633. The next prime is 12747046679. The reversal of 12747046640 is 4664074721.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79668962 + ... + 79669121.

Almost surely, 2^12747046640 is an apocalyptic number.

12747046640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12747046640 is an abundant number, since it is smaller than the sum of its proper divisors (16889836984).

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

12747046640 is a wasteful number, since it uses less digits than its factorization.

12747046640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159338096 (or 159338090 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 41.

The spelling of 12747046640 in words is "twelve billion, seven hundred forty-seven million, forty-six thousand, six hundred forty".