12640206453 has 48 divisors (see below), whose sum is σ = 19918080000. Its totient is φ = 7108595424.

The previous prime is 12640206451. The next prime is 12640206457. The reversal of 12640206453 is 35460204621.

It is not a de Polignac number, because 12640206453 - 2¹ = 12640206451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640206451) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2526048 + ... + 2531046.

It is an arithmetic number, because the mean of its divisors is an integer number (414960000).

Almost surely, 2^12640206453 is an apocalyptic number.

It is an amenable number.

12640206453 is a deficient number, since it is larger than the sum of its proper divisors (7277873547).

12640206453 is a wasteful number, since it uses less digits than its factorization.

12640206453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5286 (or 5279 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 12640206453 in words is "twelve billion, six hundred forty million, two hundred six thousand, four hundred fifty-three".